From 10.30am tomorrow [Fri 17 Feb], Portsmouth Naval Base is closing Trafalgar Gate, and all dockyard traffic will be using Unicorn Gate.
We're not expecting significant traffic problems, because most traffic leaving the base will do so at lunchtime, well before the main rush-hour.
We'll be monitoring flow and adjusting traffic lights if required to help ease any congestion. However, we'd encourage drivers to think about their journeys and avoid the area if possible.
Trafalgar Gate will reopen at 6am Monday.
There will be a similar closure of the gate on Friday 10 March.