The overhead electronic signs are used to communicate travel conditions to road users in real time.
Our operators monitor traffic densities and speeds from the Road Network Operations Centre, using in-road sensors and other technologies. If congestion is building, they use the overhead electronic signs to drop speeds on the freeway, slowing vehicles down to allow the traffic ahead to clear, preventing stop-start conditions.
The overhead signs are also used to close lanes when needed, directing traffic into adjoining lanes if there are incidents ahead on the Smart Freeway.
When our operators change speed limits on the Smart Freeway, the red circle on these speed signs will flash to draw driver attention to those changed speeds. The red circles will remain flashing until the speed signs return to their normal speeds.
These systems reduce congestion, improve travel times and enhance safety.