Overview of LTA’s External Works

Note that External Works is undergoing further refinements. More updates will be released in future COP versions.

Key GatewaysObjectiveRoad alignment details to be prepared (other details to be prepared and submitted as required)Supporting Information required
Pre-DG (Land Use, TCOT, PAFS, TIA)To establish RRL and development boundary
  1. Horizontal alignment
  2. Junction layout
  3. Commuter facilities
  4. Cycling path
  5. Road typology
  6. Development access
  7. RRL / ADR
  1. Topo survey
  2. Traffic study / TIA
Pre-Submission, Planning and Other ConsultationsTo seek clarifications for details to be submitted at DG stageAs required by Agency / QP to seek clarification from LTA
  1. Traffic study / TIA
Design Gateway (G1)To establish development platform level and development access that will properly interface with the proposed carriageway
  1. All details as per Pre-DG Stage
  2. Development access levels to tie in with development platform level
  3. Road vertical profile* (applicable to new streets and widening of existing carriageways)
  4. Cross-section and details plan
  5. Tree affected plan
  6. Layout of retaining wall
  7. Extent of proposed cut / fill slopes with existing ground level including impact on existing trees
  8. Layout of drains, sumps and box culvert including drain top level and invert level
  9. Layout of major structural works that will affect the road vertical and horizontal alignment
  10. Layout for Commuter Facilities (e.g. bus stop, covered linkways, POB)*
  11. Layout of Active Mobility Infrastructure (i.e. cycling path)
  12. Layout of street elements (e.g. lamppost, traffic schemes) that need to be modified (Applicable for existing streets)
  1. Topo survey
  2. Utilities / services plan
Piling Gateway (G1.5) (Optional)Piling gateway also includes earth retaining structures (slope, retaining wall, CBP etc.) within the road reserve--
Construction Gateway (G2)To finalise all other details necessary for construction of the road and related infrastructure works
  1. All details as per DG stage
  2. Details for access points*
  3. Geotechnical details for foundation works, retaining wall, slope etc.
  4. Structural details for road structures and roadside features e.g. POB, drain, box culvert, sump etc.
  5. Architectural & Engineering details for Commuter Facilities (structural and foundation details)*
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Independent SubmissionsTo finalise individual agency requirements after construction gateway that do not have any impact on other agencies requirementsApproval to commence engineering works/restricted activities within the Railway Protection Zone-