Introduced in April 2015, Dover TAP (Traffic Assessment Project) is a temporary traffic management system which queues port-bound lorries in the nearside (left) lane of the A20 after the Roundhill Tunnel to prevent Dover becoming congested with traffic and helping to improve its air quality.

• 40 mph speed restriction for all vehicles approaching Dover from the west via the A20
• At peak times, lorries 1queuing in the left lane will be held by traffic lights at the entry to Dover until space at the port becomes available
• Lay-bys in the area be closed
• The Coast-bound on-slip at the Courtwood junction will be closed occasionally

You will be turned back if you are a lorry driver intending to cross the Channel at Dover and you use the right-hand lane. Police and cameras help monitor and enforce this requirement.

You risk being prosecuted if

• You are the driver of any vehicle that exceeds the 40 mph speed limit at any time. Fixed and mobile speed cameras help monitor and enforce this requirement
• You use your horn while stationary, exit your cab or throw rubbish out on to the carriageway

For more information, visit the Dover Traffic Assessment Project (TAP) guidance website.