The Flemish government is updating traffic signs on highways to change how arrows on dynamic lanes indicate driver direction [1].

These modifications aim to standardize driver guidance across the region's highway network. By replacing older designs with clearer indicators, authorities intend to reduce confusion for motorists utilizing rush-hour lanes during peak traffic periods [1].

The update involves a shift to arrows that point upward. A spokesperson for the Flemish government said that an experiment with upward-pointing arrows was conducted 12 years ago on the Antwerp Ring, and that system is now being rolled out nationwide [1].

In addition to the direction change, green-arrow indicators will be used to signal lane availability. The Flemish Traffic Center said the green arrow indicates that the rush-hour lane is now open for flowing traffic [2]. This system applies to the nine dynamic lanes currently operating in Flanders [3].

The transition comes after a recent technical failure. Early Sunday morning, a power outage disabled the region's dynamic signage system. Peter Bruyninckx, a spokesperson for the Vlaams Verkeerscentrum, said that because of the power failure, they could not control the dynamic traffic signs [2].

The outage highlighted the vulnerability of the electronic systems used to manage traffic flow. On a separate Wednesday afternoon, the region saw more than 200 kilometers of traffic jams on Flemish highways [4]. The implementation of the new signage and the extended opening hours for rush-hour lanes, starting this Monday, are intended to mitigate such congestion [3].

“The green arrow indicates that the rush-hour lane is now open for flowing traffic.”

The shift toward standardized, upward-pointing signage represents a move away from localized experiments toward a regional safety standard. By integrating these changes alongside a revised schedule for rush-hour lanes, the Flemish government is attempting to optimize the capacity of existing infrastructure to combat chronic congestion and the risks posed by systemic power failures.