As part of the recently completed Bidston Viaduct refurbishment
project, it was agreed that the main contractor (Costain) would undertake
additional works to realign the entry leg to Dock Links North to try and
address a proven history of recorded personal injury accidents resulting
from traffic carrying high speeds from the A554 southbound approach
through onto the roundabout and up the slip road to the Docks Link North.
In conjunction with the entry-leg realignment, screening has also been
provided (to Highway Agency specification) to deliberately reduce
visibility and thereby force traffic to slow down and give way before
entering the roundabout. The provision of such screening is a recommended
method (see note re: 'Specialist advice' below) of restricting approach
visibility where the approach visibility of traffic on the circulatory
carriageway (or preceding entry) is too generous and results in vehicles
adopting an inappropriate high entry speed.