Architectural Design Criteria - Section 4 - Commuter Facilities Design Requirements

With effect from September 2023, ADC has been withdrawn and replaced by the Infrastructure Design Criteria (IDC) for all infrastructure-related criteria, except for works involving Bus Interchanges covered under Section 2, 4.1, 4.2 and 4.3 and their associated attachments.

1. References shall be made to Drawings L/CFADC/AR/BI/0001-0013 when using this document.

2. This document shall apply to all temporary and permanent bus interchanges and bus terminals (collectively named as bus interchange), unless otherwise exempted, with the written approval from LTA.

3. An integrated bus interchange is one that is built as an integral part of a larger development.

4. A standalone bus interchange is one that is not enclosed, with natural ventilation for the concourse and bus park area.

1. Internal and external road elements, including but not limited to, traffic signs, road markings, road humps, thermoplastic markings, signalisation, pedestrian crossings, vehicular impact guardrails, impact bollards, etc shall comply with the latest LTA Standard Details of Road Elements (SDRE) requirements.

2. Comprehensive Public Transit Signage System plan, within the bus interchange and its vicinity including the new development, shall be developed, designed and provided in accordance with LTA Signage Design Guideline Manual, Tender Conditions and Reference Manual. The provision, layout, location and detailed design of the signage shall be carried out in consultation with LTA.

3. For bus interchange which is in the vicinity of residential housing, noise mitigation measures shall be provided, unless otherwise stated.

4. In addition to NParks’ green buffer requirement, additional landscaping in and around the bus interchange shall be provided, unless otherwise stated.

1. The following studies and reviews shall be carried out and submitted by a specialist/ traffic consultant/ qualified persons to the Authority for approval prior to the finalisation of the bus interchange design and layout:

   1. Traffic Impact Assessment (TIA), unless otherwise specified by the Authority;

   2. Traffic Scheme/ Plan, mandatory for all bus interchanges;

   3. Security Consultancy Study, for bus interchange classified as National Critical Infrastructure or Key Installation if required by the Authority;

   4. Acoustic Study, mandatory for integrated bus interchange;

   5. Bus Interchange Simulation Study, mandatory for all bus interchanges;

   6. Project Safety Review PSR (Roads) by a qualified independent safety reviewer, mandatory for all bus interchanges;

   7. All mechanical and electrical system studies as required under ADC Section 4.2. e.g. Lighting Study, Computational Fluid Dynamics (CFD) Study, Environmental Impact Assessment (EIA) study, and viii. Pedestrian Simulation Study, as required under ADC Section 2.

2. The recommendations of the above studies shall be incorporated in the bus interchange design and mitigation provisions shall be catered for prior to the construction of the bus interchange.

1. All design principles and requirements outlined in all other relevant sections of the ADC shall be complied. Specifically;

   1. Interfacing development requirements in ADC Section 2 – Chapter 10,

   2. Security requirements in ADC Section 2 – Chapter 14

   3. Ease of maintenance requirements in ADC Section 2 – Chapter 16,

   4. Mechanical and electrical system requirements in ADC Section 4.2

   5. Commuter facility requirements across ADC sections 4.3 to 4.9.

2. The bus interchange shall be designed with the following principles in mind:

   1. Ease of use by commuters, i.e. minimise transfer walking distance, ensure comfortable , safe and secure environment, ease of way finding, etc; and

   2. Cost and operational efficiency of bus interchange, i.e. ensure ease of operation and maintenance, reduce recurrent costs, provide safe and efficient layout, promote staff welfare, etc.

   3. Natural lighting shall be brought into public spaces where possible

1. The bus park area shall include all the alighting berths, boarding berths, parking lots, circulation driveway, ingresses, egresses, etc.

2. The bus park area shall be designed to be naturally ventilated unless otherwise agreed by the Authority.

3. The bus park area shall be designed such that buses need not reverse at any time. In the event that there are serious space constraints, which the designer shall demonstrate that all options are exhausted, only 12m standard buses are allowed to reverse for the design of the driveway and bus parking area. For such cases, sufficient and satisfactory mitigating safety measures (e.g. convex mirrors, reverse sensors) shall be provided. 18m articulated buses shall not reverse within bus interchange for safety reasons.

4. The design shall be such that passenger loaded buses need not travel in the driveway where buses are reversing. If unavoidable and upon approval by the Authority, a separate 3.7m lane shall be provided next to the driveway where buses are reversing.

5. The bus park area shall be designed with minimal structural columns, unnecessary structures, kerbs or other building elements so as to minimise visual obstruction to the bus drivers and improve the efficiency and safety of bus circulation.

6. There shall be no pedestrian routes within the bus parking and bus circulation areas of the bus interchange.

7. A minimum clear height of 5.4m, measured from the road level to the underside of all structures or services (e.g. M&E), is required.

8. The lateral clearance between the outer edge of the road kerb and any element shall be minimum 0.6m. Bus park area shall be designed with additional clearance taking into considerations the low bus overhangs for wheelchair accessible buses.

9. Bus interchange floor shall be designed and treated to minimise vibration impact to the adjoining occupancies caused by the buses travelling at the speed of 30km/h. The assessment of building vibration with respect to human response in adjoining occupancies shall be evaluated in accordance with BS 6472-1: 2008. The vibration dose value predicted shall meet the range with low probability of adverse comments in accordance with Table 1 in BS 6472 for the respective occupied space in the building.

10. The structural elements within the bus interchange shall be designed for vehicular impact load and installed with protection bumper. Otherwise, vehicle impact guardrails or bollards shall be installed.

11. For proper water drainage, the bus driveway shall be designed with proper run-off and drainage at the perimeter. Catch basin drainage for water catchment shall be provided on the driveway where all boarding and alighting berths are positioned [for details refer to SDRE].

12. The platform level of the bus park area shall be higher than the surrounding roads.

13. Traffic schemes/ plans shall be provided covering the entire bus park area and peripheral access junctions.

1. A Bus Interchange Simulation Study (e.g. swept path/ auto turn analysis) shall be carried out covering the entire bus park area and submitted by an independent specialist/ traffic consultant to the Authority for approval prior to the finalisation of the bus interchange design and layout.

2. The scenarios of this study shall include the worst case scenario within the bus interchange, with fully parked buses, fully occupied berths, more than 1 bus waiting to exit, bus overtaking, etc. Parameters of the study, methodology, analysis of the full cycle of the bus movement from the bus entrance into the bus interchange to its exit, and softcopies shall be shared with the Authority and the operators.

3. This study shall verify and ensure that the bus circulation, parking, berthing, etc within the bus interchange are safe and efficient for operation.

4. This study shall verify and ensure that all berths can allow berthing of wheelchair accessible buses with easy accessibility for passenger-in-wheelchair. The study shall demonstrate that the bus can align parallel and as close to the berth kerb as possible.

5. In addition to this study, bus trials on site shall be carried out so as to satisfy the Authority and the operators that the above requirements have been met.

1. The number of bus ingresses/ egresses, their nature (separate or combined) and junction arrangement (i.e. full movement signalised junction or limited movement) shall be provided as advised by the Authority. The bus ingresses/ egresses shall have priority over other development accesses, lay-bys, etc.

2. Chain gates or barriers shall be provided at the ingresses and egresses. The gates or barriers shall not impede the bus operations and pedestrian flow. To prevent jaywalking, perimeter fencing shall be provided along the perimeter of the bus park.

3. Where the pedestrian needs to traverse the ingresses or egresses, signalised pedestrian crossing, overhead or underground pass shall be provided.

4. There shall be no obstruction to sight at all the ingresses and egresses. Bus Drivers shall have a clear view of the main road traffic prior to exiting from the bus interchange driveway onto the main road. Minimum clear sight distance shall be provided in accordance with the LTA Civil Design Criteria.

5. Double-sided road signs “Buses To Look Out For pedestrians” shall be provided at both sides of all the ingresses and egresses.

6. “No Entry except Authorised Vehicles” signs shall be provided at both sides of all the ingresses and egresses.

7. Chevron markings on the driveway and road shall be provided at the ingresses and egresses to guide and prevent buses from coming too close to the kerbs.

8. Double zigzag lines outside the ingresses and egresses shall be provided.

9. The width of the ingresses and egresses shall be minimum 8m for single-direction and minimum 10m for dual-direction, subject to the Bus Interchange Simulation Study.

1. The number of bus parking lots provision shall be 3 parking lots per bus service.

2. The parking lot dimensions shall be as follow:

   Type of Parking Lot	Overall Width (m)	Overall Length (m)	Equidistance of parallel lots
   12m Standard	3.5	12.7	4m apart
   18m Articulated	3.5	18.2	6m apart

3. All bus parking lots shall fully accommodate standard 12m bus. Numbers of lots accommodating 18m articulated buses to be confirmed by the Authority.

4. Bus parking lots shall be demarcated with 100mm wide thermoplastic paint marking. Lots markings shall be yellow or other colours as prescribed by the Authority. For the paint marking, refer to Drawing ref. L/CFADC/AR/BI/0003.

5. Bus park wheel stoppers and humps shall be provided for all bus parking lots. They shall be cast in-situ together with the bus park area with proper reinforcement bars/ bolts to the ground. For details of bus park wheel stoppers, refer to Drawing ref. L/CFADC/AR/BI/0003.

1. The minimum clear width of the driveway shall be as follows:

   Type of Driveway	Minimum Clear Width (m)
   Saw-tooth Bus Park with driveway on 1 side/ One-directional	12
   Saw-tooth Bus Park with driveway on both sides/ Two directional	14
   End-on Bus Park with driveway on 1 side / One directional	18
   End-on Bus Park with driveway on both sides / Two directional	21

2. Kerb height for driveway and berths shall be 150 mm with black/ white strip painting.

3. Kerb height at front of end-on-berth parking lots shall be 120mm with black/ white strip painting.

4. Driveway ramp gradient shall not be steeper than 1:20.

5. In the event that an up-ramp and a down-ramp are needed, the design shall cater and ensure that the point of apex of the ramps clears the bus undercarriage, and front and rear overhangs of the bus. Otherwise, a flat area shall be provided for at least an 18m articulated bus.

6. Proper footpaths and pedestrian crossings shall be provided for bus drivers/ operations and maintenance staff.

7. Adequate “No Walking Within Bus Park” signs shall be provided (refer to LTA Signage Reference Manual). The signs and location shall be proposed for the Authority’s approval.

1. The bus interchange shall be designed to cater for the expected number of bus services as prescribed by the Authority.

2. For saw-tooth design, the arrangement of the berths shall be in a clockwise manner, starting with alighting berths followed by boarding berths.

3. Large, visible and reflective berth number plates outside the concourse shall be provided. The numbering system shall be in clockwise manner, starting with A1 for alighting berth one, B1 for boarding berth one and so on so forth.

4. The type of berths and number of bus services shall be as follow:

   Saw-tooth Boarding	3 bus services per berth
   End-on Boarding and Alighting	3 berths per service
   Straight Alighting	6 bus services per berth

5. All boarding and alighting berths shall fully accommodate standard 12m bus. Number and allocation of berths accommodating 18m articulated buses to be confirmed by the Authority.

6. For saw-tooth boarding berths, the angle of approach shall be 10 degrees to the berths. The length of saw-tooth boarding berths shall be 20m for 12m standard buses. For details, refer to Drawing ref. L/CFADC/AR/BI/0012.

7. The first alighting berth after the ingress and the last saw-tooth boarding berth before the egress shall be at least of a straight line distance of 12m.

8. At the L-shape bend, the berth after the bend shall have a clear distance of 15m from the last berth (or less depending on Bus Interchange Simulation Study) before the bend.

9. For end-on berths, the boarding and alighting ‘tongue’ shall be minimum clear width 1.5m, measured from the road kerb to the outer edge of any railing or obstruction, and in compliance to the requirements of the Code on Accessibility in Buildings. Safety guide stainless steel railings shall be provided along the ‘tongue’. Please refer to Drawing L/CFADC/AR/BI/0001.

1. Retro reflective sheet shall be provided on the surface of walls, columns, bollards or any other vertical elements.

2. Large (not less than 1m diameter/ length) convex mirrors, cylindrical convex mirrors, reverse sensor with warning lights, whichever appropriate, shall be provided, where there are blind spots and visual obstruction.

3. There shall be a clear segregation between the pedestrian and bus circulation.

4. Vehicle impact guardrail shall be provided for hose reels, hydrants, lamp posts, M&E ducting etc.

5. Depending on the types of bus interchange, safety bollards or security bollards shall be installed along the edge of concourse next to the bus park area.

1. The bus park shall be designed in accordance to latest LTA SDRE requirements and LTA Materials and Workmanship (M&W) Specifications for Roadworks Chapter 10.

2. For temporary bus interchange (less than 5 years use), the bus park area, including the access junctions, shall at least be made of rigid pavement. Refer to Standard Details of Road Elements (SDRE) for details.

3. For permanent bus interchange, the bus park area, including the access junctions, shall be made of semi-rigid pavement system. For details refer to LTA’s Civil Material and Workmanship Specification or Project Specifications.

4. The design and colour of the bus park shall be designed with contrast such that the traffic markings are visible.

1. The concourse area shall include all the alighting, boarding berths, offices, other facilities, etc as stated in this document.

2. A minimum clear width, free from all encumbrances (including queue rails), shall be provided along the concourse based on the following:

   No. of Bus Services (n)	n < 10	10 ≤ n ≤ 20	>20
   Minimum clear width (m)	6	8	10

3. The concourse shall be designed with minimal structural columns within the concourse area, entrances/ exits and doors.

4. The location and layout of the concourse shall be planned and designed such that the transfer between MRT, bus interchange and bus stops shall be direct and shortest. In addition, the connectivity between these transport nodes, development and commuter facilities (e.g. taxi stand, pick-up/ drop-off bays) shall be sheltered.

5. There shall be minimum 3m clear height to the underside of the ceiling.

1. The number and width of pedestrian entrances/ exits and sheltered linkways from the concourse to nearby MRT station, bus stops, commuter facilities and developments prescribed by the Authority shall be a minimum and shall be increased if needed as determined by any Pedestrian Simulation.

1. The concourse shall be air-conditioned.

2. Where escalators are linked to the concourse, sufficient holding area, with a minimum of 6m distance from the escalator landing comb plates, shall be required. Staircase next to the escalators shall be provided, unless otherwise exempted by the Authority.

1. The segregation wall between the concourse and the bus park area shall be 1m height topped with laminated glass panels to the ceiling and then fully enclosed above the ceiling.

2. The segregation wall between the concourse and other development shall be a physically opaque wall, unless prior approval is obtained from the Authority.

3. All accesses from the Bus Interchange into any development or vice versa, shall be provided with security shutters.

4. All entrances leading to outside road (excluding development), boarding and alighting berths shall be equipped with automated screen doors (ASD) with air curtains. These doors shall be heavy duty, tempered laminated glass and equipped with auto lock mechanism when they are switched off after operational hours. The ASD shall be designed to be switched off locally at individual screen doors and alternative remote access from the Passenger Service Office 1.

5. There shall be two sliding ASD for each boarding berth. Motion detector sensors on the interior side of the concourse and loop detector sensors on the berth driveways shall be provided to activate the ASD when a bus arrives. For alighting berth ASD, motion detector sensors shall be provided on the exterior side of the concourse area. For end-on berths, motion detector sensors shall be provided on both sides of the ASD.

6. Hands-off signs shall be provided at the side of each ASD. Refer to the LTA Signage Reference Manual for the sign details.

7. In addition to ASD, manual glass swing doors to the driveway shall be provided for every two berths. These doors shall be made of heavy duty tempered laminated glass.

8. All doors shall also be manually lockable.

9. Shutter bulk heads and ASD guide rails at the boarding and alighting berths shall be located within the bus park area or enclosed within the ceiling.

1. For walls, cladding finishes shall be provided. For floor, darker shades of tiles shall be provided. Slip resistance shall be in accordance to Section 2 of the ADC - Chapter 3

1. The concourse of a non air-conditioned bus interchange shall be designed to be naturally ventilated. In addition, there shall be provision of industrial type oscillating fans at the concourse area.

1. The design of the roof shall cover the entire concourse. In addition, the design of the roof shall cover the boarding and alighting berths driveway area, such that the entire bus, including double-decked bus and 18m articulated bus, is fully sheltered from the rain.

2. With the high roof, the design of the roof overhang, louvre/ screen shall ensure no rain pelting into the concourse.

1. For walls, it shall be weatherproof external grade anti fungal paint. For floor, it shall be granolithic.

1. Queue rails shall be provided at each boarding berth. Please refer to Drawing L/CFADC/AR/BI/0012 for details of the queue rails.

2. The minimum clear width for all queuing areas shall be 700mm and shall be measured between the outer edge of any element including queue rails, signage posts and bum rests.

3. The queue rails with bum-rests shall be stainless steel grade 304, hairline finish.

4. For all queue rails, overhead stainless steel frame with signage plates for berth number and bus service numbers shall be provided. The berth numbering system shall be in clockwise manner, starting with A1 for alighting berth one, B1 for boarding berth one and so on so forth.

5. At the side of all queue rails, signage plates for bus service numbers shall be provided.

6. The design of queue rails shall cater for sufficient waiting space for passengers-in-wheelchair which shall be demarcated on the ground with blue-coloured tiles. Pictogram signage shall be erected.

7. 600mm wide yellow tactile tiles shall be set at 0.6m away from driveway kerb perpendicular to commuters’ flow. Please refer to Drawing ref. L/CFADC/AR/BI/0012.

1. One set of 4-seater benches with armrests shall be provided per boarding berth, with a minimum of six benches.

2. The benches shall be stainless steel grade 304, hairline finish and bolted to the ground.

3. The location and type/ design of the benches shall be proposed for the Authority’s approval.

1. Information panel board with locks shall be provided. Refer to the LTA Signage Reference Manual.

2. The number of board sets shall be provided based on the following:

   No. of Bus Services (n)	n < 10	10 ≤ n ≤ 20	>20
   Number of Board Set	2	3	4

3. Each set shall have 4 glass panels, and may be single or double sided, depending on its location in the concourse, to be confirmed with the Authority.

4. The frame of the board shall be aluminium and bolted on ground or wall mounted.

5. The location of the boards shall be on one side of the concourse and not impede commuter flow. The location and type/ design of the board set shall be proposed for the Authority’s approval.

1. The offices and all facilities stated here shall be included in the concourse, unless otherwise stated.

2. All other M&E rooms and facilities needed for the functioning of the bus interchange (e.g. AHU, chiller plant, switch room, MDF, generator rooms) shall be in the concourse area.

3. Signage for all offices and other facilities shall be provided.

4. The Passenger Service Office 1, Administration Office, Manager Room and Server Room, shall be designed to be contiguous. The Server Room shall be adjacent to Passenger Service Office 1. These, together with the Passenger Service Office 2, Ticket Office and Add Value Machine Room, which are adjacent to each other, shall be centrally located in the concourse.

5. All doors and windows shall be lockable.

6. The interior finish of all toilets, kitchens and canteen shall as a minimum be; tiled floor & walls and moisture resistant demountable suspended ceiling unless otherwise stated. Slip resistance shall be in accordance to SS 485.

7. The interior finish of all offices and other facilities below shall as a minimum be; tiled floor, plastered and painted wall and demountable suspended ceiling unless otherwise stated.

8. Electrical substation and any other M&E rooms not listed shall as a minimum be; Reinforced Concrete floor slab with screed and hardener, plastered and painted wall and ceiling.

9. Type and specifications of all materials including type and application of skirting shall be subject to confirmation and approval by the Authority.

1. The two Passenger Service Offices 1 (For Primary Bus Operator) and 2 (For Secondary Bus Operator) shall be independent rooms with their own dedicated access. Doors shall be opened to the concourse area.

2. Laminated glass panel and half wall with or without customised openings (for Bus Captain tapping machine) and with service counter top shall be provided, with the provision and dimension of the customised openings to be confirmed by the bus operators.

3. The glass panel at the service counter shall be designed such that the passenger and the PSO staff can hear each other easily without the aid of microphone and speakers.

4. Motorised Aluminium Roller Shutters (with manual override) shall be provided 200mm behind the glass panel. Control Box to be provided beside the counter inside the room.

5. For details of the Passenger Service Offices, please refer to Drawings ref L/CFADC/AR/BI/0005 to L/CFADC/AR/BI/0008.

6. The CCTV viewing facilities, Building Management System’s (BMS) Operator Workstation and Fire Repeater Panels shall be housed in the Passenger Service Office 1.

1. Foldable panel doors shall be provided within this room to segregate Staff Lounge and Briefing Room.

2. Room door shall be opened to the concourse area.

1. Doors shall be opened to the concourse area.

2. Laminated glass panel and half wall with customised openings incorporating service counter top shall be provided.

3. Width of each counter shall be 1400mm. Please refer to Drawing ref L/CFADC/AR/BI/0009 to L/CFADC/AR/BI/0010

4. Motorised aluminium roller shutter (with manual override) shall be provided, subject to approval by the Authority. Control Box to be provided beside the counter inside the room.

5. Queue railings of clear width 700mm shall be provided, with the length, layout to be approved by the Authority. The design of queue rails shall cater for sufficient waiting space for passengers-in-wheelchair. Please refer to Drawings ref L/CFADC/AR/BI/0001.

1. Wall opening of size 1076mm (height) x 555mm (width) for Add Value Machine shall be provided for each room. The Please refer to Drawing ref. L/CFARC/AR/BI/0004.

2. The AVM Room can be combined with the Ticket Office with no separating wall, subject to Authority’s approval.

1. The Commercial Spaces shall be strategically located within the concourse.

2. The number of compartmentalised units shall be in the range of 15 to 30sqm.

3. These units shall be provided with a proper frontage facing the concourse, with a minimum depth of 3m.

4. A maximum of 50% of these units shall be equipped with wall kitchen exhaust system and grease trap for cooking purposes.

5. For air-conditioned bus interchange, these units shall have walls and motorised aluminium roller shutter (with manual override).

6. Other commercial developments shall not front the concourse, regardless of the amount of distance setback.

1. The Kitchen shall be adjacent to the Canteen with the door opening to the Canteen.

2. The Rodent-Free Store shall be adjacent to the Kitchen with door opening to the Kitchen.

3. The servery area in the canteen shall be provided with one double bowl sink with drainer for every 4.8sqm.

4. One wash basin shall be provided in the canteen.

5. One double bowl sink with drainer shall be provided in the kitchen.

6. The Kitchen shall be designed for cooking purposes and equipped with kitchen exhaust system and grease trap.

7. Motorised full-height aluminium roller shutter (with manual override) shall be provided for the canteen entrance.

8. All walls in the canteen and Kitchen shall be fully tiled.

1. The door shall open to the Passenger Service Office 1. No window is needed.

2. The computer servers, CCTV backend equipment (e.g. CCTV recording facilities, CCTV network switches, etc) and BMS shall be housed in the Server Room.

1. In addition to Staff Toilets, public toilet facilities shall be provided in the concourse.

2. The provision of public toilet facilities, including handicapped toilet, shall comply with NEA and BFA requirements. For public male toilet, one extra set of cubicle, urinal and wash basin shall be provided, in addition to NEA’s requirement.

3. For all toilets, including Staff Toilets, heavy-duty auxiliary facilities including hand dryer, soap dispenser, mirror, toilet fixtures, jumbo toilet roll holder, door coat hooks, sanitary napkin disposal unit (for female toilets), etc shall be provided.

4. Handicap toilet shall preferably be provided with a heavy-duty sliding door.

1. A dedicated Bin Centre/ Point and Electrical Substation shall be provided in accordance with relevant authorities' requirements, with the location to be proposed for Authority approval.

2. The Bin Centre/ Point and Electrical Substation shall be located to facilitate efficient and safe operation of the bus interchange and shall be sheltered and away from concourse area. Footpath shall be provided for easy access, if necessary.

3. Vehicle lay-bys within the bus interchange space shall be provided for rubbish and power vehicles so that bus circulation and operations are not affected

4. Bin Centre shall be provided for refuse output exceeding 1,000L/day and shall be in accordance to NEA requirements.

5. Floor and walls in Bin Centre and Points shall be fully tiled.

1. Bicycle parking racks shall be provided in the vicinity of the bus interchange.

2. A minimum of 40 bicycle parking racks shall be provided. Variations and addition to the number of bicycle parking racks shall be highlighted as required, dependent on the local catchment.

3. The location, distribution and design of the bicycle parking racks shall be proposed for Authority approval. Please refer to Drawings ref L/CFADC/AR/BI/0013 to L/CFADC/AR/BI/0014.

1. A 1m (width) x 2.1m (height) door with single door leaf and clear opening shall be provided.

2. One wash basin with wall mounted mirror shall be provided.

3. Space for baby changing facilities which include a fold down changing table, shelf and facility to dispose of soiled diapers shall be provided.

1. 1m long horizontal stainless steel railing fixed to back wall at 1m height

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

This document, which is also called the Electrical and Mechanical Design Criteria for Commuter Facilities (EMDC CF), defines the criteria and requirements for the design, supply, installation, testing and commissioning of the Electrical and Mechanical (E&M) services for Bus Interchanges.

The Authority shall be highlighted of any contradiction or conflicts within the criteria set out hereafter. In addition, the Authority shall be notified and acceptance shall be sought for any change or new requirements that may arise during the works.

Unless otherwise stated, the mechanical and electrical works for commuter facilities shall be governed by all applicable local regulations, codes, standards and requirements issued by all relevant authorities having jurisdiction, which shall include but not limited to the following:

-Public Utility Board (PUB)

-Singapore Civil Defence Force (SCDF)

-Building Control Authority (BCA)

-Ministry of the Environment and Water Resources

-National Environment Agency (NEA)

-National Parks Boards (NParks)

-Energy Marketing Authority

-Productivity and Standards Board (PSB)

-Land Transport Authority (LTA)

-Standards, Productivity and Innovation Board (SPRING)

Where there are discrepancies or conflicts between the above, the attention of the Authority shall be sought for final decision. Compliance with the EMDC CF criteria shall not preclude the need to obtain full clearance and approval from the Authority’s Development and Building Control Division (DBC), the Authority and all authorities having jurisdiction.

Pre-submission consultation with the Authority may be applied through the Development and Building Control Division (DBC) where submission involves noncompliance to the EMDC CF requirements; Application for approval or waiver or modifications shall be submitted to the Authority through the DBC.

All relevant Authorities Having Jurisdiction (AHJ) such as NParks, PUB, Power Grid Ltd, Power Supply Ltd, LTA, etc shall be pre-consulted before embarking on the design of the commuter facilities. All such pre-consultation shall be minuted and these minutes shall be submitted to the Authority and AHJ as records.

Two (2) sets of the documents listed below shall be submitted, in the appropriate format, when seeking approval from the Authority and prior to commencement of works.

All drawings and calculations shall be certified by the Qualified Person (QP). No works shall commence until approval of the subject design and relevant waiver is obtained from the Authority in writing.

-Site and location plan showing the source of the incoming power and water supply and indicate the area that is to be hand-over to LTA.

-Single line diagrams for the electrical installation.

- Lighting and power layout plans including schematic diagrams showing the OG box layouts and cable routing plans.

- Earthing system schematics and layout plans.

- All electrical calculations to substantiate selection of plant and equipment. The submission shall include circuit breaker and cable sizing, fault level calculations, discrimination setting between various breakers and etc.

- Catalogues with all relevant test certificates to demonstrate compliance with specified and performance requirements.

- Lighting design calculations to substantiate that the design is in accordance with the design criteria and specified requirements.

- Lightning Protection System shall design in accordance to the latest edition Code of Practice, SS 555.

- Air-conditioning and Mechanical Ventilation System Design

- Fire Protection System Design

- All services routing, installation detail and sizes

- Properly dimensioned layout diagrams showing the location of equipment

- Equipment installation details

- Control and monitoring system and strategy for the mechanical system

- Calculations including cooling load calculation, mechanical ventilation calculations, pump capacity sizing, operating pumping head and pump operating levels (start/stop, alarm level, etc), fan pressure calculations, cable sizing, voltage drop calculations, motor starter capacity, etc.

- Calculations on the mounting, inertia blocks vibration isolations and noise controls.

- Structural equipment bases, supports and tank details

- Catalogues and technical specifications for the equipment, materials and accessories

The Authority shall be notified of any deviations from the approved plans and the revised plans shall be submitted to the Authority for acceptance before any deviation works commenced.

Upon completion of the mechanical and electrical works, visual inspections and all necessary testing and commissioning shall be performed to demonstrate compliance with the design and specified requirements. The test results which shall be endorsed by the QP shall be submitted to the Authority for acceptance. Instruments used for the tests shall have a valid calibration certificate. The calibration certificates shall be submitted together with the test results. The tests which shall be conducted shall include but not limited to the following:

1. Site Lux Level Measurement Test Results for Lighting System.

2. Electrical System Tests

   • Insulation voltage test with appropriate insulation tester

   • Earth loop impedance test

   • Continuity test on the conductor & joints

   • Polarity and phase sequence

3. Earth Resistance Test Results for Lightning Protection System

4. Mechanical System Tests

   • Individual Equipment and System Performance Tests

   • Air and Water Balancing Test

   • Hydraulic Test - Pump Test

   • Operation and Control Function Tests

   • Noise Level Measurement

The Authority shall be given at least 7 days advanced notice of any joint inspection or tests. The Designer shall rectify all defects identified during the joint inspections and a final joint inspection to certify the clearance of all defects shall be arranged.

Two (2) sets of the as-built drawings, testing and commissioning results endorsed by the QP and operation and maintenance (O&M) manuals for the electrical and mechanical installations, shall be submitted to the Authority, prior to handling over to the commuter facility to the Authority. These shall include but not limited to the following:

- As-built electrical single line diagrams

- As-built Lighting and power layout plans / As-built Earthing system schematics and layout plans / As-built Lightning protection system layout plans.

- Testing and commissioning results of the lighting level and electrical installation

- Testing and commissioning results of the Lightning Protection System and certificate of supervision for Lightning Protection is in accordance to the latest edition of Code of Practices, SS 555.

- As-built mechanical services plan

- Testing and commissioning results of the mechanical services and related electrical installation

- Approved mechanical services plans to authorities

- Verification of the proper functioning of the equipment and system

- Verification on the performance of the installed equipment and system meeting the specified design life.

- All tests required by the relevant authorities

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

< Refer to Infrastructure Design Criteria>

In addition to the requirements as specified elsewhere in the document, the design of the bus interchange shall also comply with the requirements stated herein.

1. Dedicated M&E services, sewerage system, drainage services, telecommunication systems, water supply systems and incoming utility services shall be provided with the sole purpose to serve the functions of the Bus Interchanges.

2. All utilities and services provided to serve the Bus Interchanges shall be connected at the intake point with separate metering provision.

3. A kWh meter shall be provided for each of the following areas:

   − Concourse

   − Each commercial space unit

   − Canteen

   − PSO 2

   − AVM Room and Ticket Office

   − Rest of the Offices

   − Air-condition plant

   − Mechanical ventilation plant

   − Bus parking area