On dual carriageways, when the road works are extensive, some traffic lanes may be switched to the other carriageway.

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   Road Sign Road Sign Road Sign

Traffic post

Road Sign Road Sign  

Temporary signs give you information on the traffic lanes ahead and time to move to the correct traffic lane if necessary.

In general, drivers of large vehicles should use the left most lane.

Traffic signs warn you of the change to the other carriageway for one or more lanes of traffic. Stay in your lane and follow the traffic signs and traffic cones placed on or by the road to guide you. Take particular care when driving through the gap in the central reservation if your lane switches to the other carriageway. On the carriageway with two-way traffic, water-filled barriers, traffic cylinders or traffic cones are used to separate traffic flows. Traffic lanes may be narrower than usual and there is little room for error so take extra care and keep your speed down. Traffic signs warn you of the change back to the original carriageway. On returning to the normal carriageway, stay in your lane until well past the road works unless traffic signs or road markings indicate otherwise.

One-tube-two-way operation in tunnels

One-tube-two-way operation is generally implemented in the small hours of morning for regular tunnel maintenance or cleansing works.

When implementing one-tube-two-way operation, the speed limit in tunnel tube will be lowered to 50km/h in general. You must strictly follow the traffic signals and signs of the temporary traffic arrangement, particularly the diversions at both ends of the tube. You must obey all signals and directions given by the tunnel officers and should pay attention to the advisory message displayed on variable message signs or broadcasted through radio broadcasting system