Allowances for Edge Constraints

Strategy behind the Standard

Where a cycle track is bounded by a vertical feature, people will not be able to use the entire width as they will naturally be wary of riding immediately next to walls and kerbs. Designers should therefore address this issue by providing additional width as shown in the below table.

Allowances for Edge Constraints/ Boundary treatment:

Cycle Infrastructure Design LTN 1/20 – Chapter 5.5, Table 5-3

Type of edge constraint Additional width requirement (mm)
Flush or near flush surface up to 60mm Nil
Kerbs 61mm to 150mm high Add 200mm
Vertical feature from 150mm to 600mm high Add 250mm
Vertical feature above 600mm high Add 500mm
Drainage Gullies Add width of drainage gully

Best Practice Guidance to be used by Essex Highways.
For detailed guidance on edge constraints, please see Cycle Infrastructure Design LTN 1/20 – Chapter 5.5.

Internal Stakeholder Engagement

Whenever designing new or upgrading existing cycling infrastructure ensure the following depts./teams are consulted: Maintenance, Asset Management, Network Assurance, Road Safety.