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Home » Road Projects » Area 6 » A12 M25 Ipswich (A120/A12 - Harwich) » Publications » A12 and a120 route management strategy » A12 and a120 route management strategy
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A12 and a120 route management strategy

9.3.22 Strategy Element

A12 and A120 Route Management Strategy

9.3.22 Strategy Element
Action: Investigate Congestion Reduction Measures at 3 to 2 Lane Changes
Priority: Medium Ref: 7E
Initiation: South of Colchester there are three lengths of theA12 which, unlike the majority of the route, are dual three lanes rather than theusual dual two lanes. At the three to two lane reductions which occur in eachdirection a breakdown in traffic flow often occurs during peak periods.

Normally this situation occurs at a junction where the extra lane is lost orgained for turning traffic. However, at Crix Bridge (between Boreham andHatfield Peverel) and just north of Ingatestone this change does not occur ata junction and this increases congestion.
Action description: A trial will be undertaken on the sections, whichnarrow from three to two lanes between interchanges to see if congestioncan be reduced. This may include reducing the lane width to two lanes fromthe preceding junction.
Objective(s) met: Objectives can only be met if trials are successful.Economy OC2 and 3 objectives would benefit.
Benefits: A reduction in congestion will be the result of anymeasures and journey times will also be more predictable.

Safety and the environment will also gain, as tail end collisions and airpollution caused by congestion could be reduced.
Timescale: Trials are planned to take place in year 4, howeverthis may be affected by the results of the Multi-modal Study.