Strategy Behind the Standard
Advanced Stop Lines (ASLs) enable cyclists to take up the appropriate position in the waiting area between two stop lines, for their intended manoeuvre ahead of general traffic, before the signals change to green.
ASLs only provide benefit to cyclists on a signal approach when the traffic signals are on red. They have little value on approaches that are free-flowing for most of the cycle, and/or with multiple lanes. ASLs do not remove conflict with motor vehicles and are therefore unattractive to less confident cyclists.
Best Practice Guidance to be used by Essex Highways
Cycle Infrastructure Design LTN 1/20 – Chapter 10.6.42
How the Standard Should be Applied
ASLs should only be considered to meet the full accessibility needs of most people on a junction approach which meets the following criteria:
- Traffic flows of less than 5,000 PCUs per day.
- There are no more than two traffic lanes.
- The approach is on green for no more than 30% of the cycle time; and
- There is a nearside protected route to the ASL that is of sufficient width to accommodate the cycle design vehicle.
Approach lanes are usually provided on the nearside. Where there are high numbers of left turning vehicles mixing with cyclists going ahead or right, central or offside feeder lanes between the general traffic lanes could be considered. However, such lanes involve riding between motor traffic streams and are therefore not usually considered safe by less confident riders and people with younger children. Where provided they should be at least 2.0m wide.
Examples of Best Practice in Chelmsford
Broomfield Rd
New Street