Traffic is expected to start moving slowly through the tunnel again, after a road accident caused significant queues through town.
Emergency services attended a single-vehicle crash at Green Street roundabout this afternoon.
Ambulance crews are treating two passengers, whose injuries aren't believed to be serious.
No other vehicles or pedestrians were involved.
The vehicle has been removed, and the road has re opened.

30 Bays renamed for tenth anniversary
Call for temporary fuel duty cut in Jersey
Ferry terminal plans include new duty-free shop
CIAS Backs mental health drive as missing person searches rise
Man jailed for drugs offences in Jersey
World Cup excitement builds in Channel Islands
Skirmish between British yacht and Russian warship near Alderney
Energy overhaul at St Clement Parish Hall