Summary

• Oversized and heavy cargo movements in Singapore are regulated for road safety.

• Permits are required when vehicle size, overhang, or weight exceeds set limits.

• Police escorts are mandatory for larger or heavier movements.

• SMP Global supports permit planning and coordination for oversized and project cargo.

Permit requirements often affect schedules more than transport time. Early checks help avoid last-minute delays and rework.

Why road permits are required

Oversized and heavy vehicles move more slowly and place additional stress on road infrastructure. Regulation helps protect other road users and ensures safe passage along approved routes.

Any movement that exceeds standard vehicle limits must be reviewed and approved before travel.

When a road permit is required

An oversized vehicle movement permit is required when any of the following apply:

• Overall width, including load, exceeds 3.0 m

• Overall width exceeds 2.6 m on controlled roads

• Rear overhang exceeds 40 percent of vehicle length or 1.8 m, whichever is lower

• Overall weight exceeds the vehicle’s permitted laden weight

Permit applications must be submitted at least three working days before the planned movement.

When a police escort is required

In addition to a road permit, a police escort is required when:

• Overall width, including load, exceeds 3.4 m

• Overall height, including load, exceeds 4.5 m

• Overall vehicle weight is 80,000 kg or more

Escort requirements apply regardless of travel distance.

Additional documentation requirements

Larger or heavier movements may require supporting technical reports.

• Vehicles with overall width of 6 m or more require a route survey report

• Vehicles with overall weight of 200 tonnes or more require a professional engineering report

These reports assess road conditions, structures, and clearance along the planned route.

Planning considerations

Permit approval is only one part of the process. Route selection and timing also matter.

Consider:

• Bridge and overhead clearance

• Turning radius at junctions

• Time-of-day restrictions

• Border coordination for cross-border moves

Changes after permit approval may require resubmission.

Practical note

A load that meets width limits may still require an escort due to height or weight. Reviewing all dimensions together helps avoid incomplete applications.