Waka Kotahi is introducing a variable speed limit (VSL) to safely manage southbound traffic where SH1 and SH59 merge, and to ensure safety and efficiency on the section of SH1 to the Helston Road overbridge at Johnsonville.
This extends the existing VSL, currently in place on SH1 from Helston Road to the Terrace Tunnel, to the southern end of Transmission Gully.
A VSL allows Waka Kotahi to adjust the speed limit and help manage incidents on the road or adverse weather conditions that may affect safety of road users. It can also be used to slow vehicles down if there is congestion ahead, or for temporary traffic control.
Electronic VSL signs will be progressively installed, however Waka Kotahi will temporarily use static signs approaching the Linden merge point between SH1 and SH59 until it is comfortable with how the network surrounding Transmission Gully is working.
All other speed limits that were consulted on are to ensure that vehicles are travelling at safe and appropriate speeds when using on and off-ramps connected to the motorway and other sections of state highway.