M25 J21 Chiswell Interchange

Route

M25 and A282

Junction number

21

Markerpost

122.8

Name

Chiswell Interchange

Type

Non-standard interchange

Terminus

Not a terminus

Other routes

M1

Authority

National Highways

Restricted turns

Some turns restricted

Services

No services

Layout and signage

The NORTH
Luton & Airport
M1 Link
  M1     M1   The NORTH
Luton & Airport
M1 Link

Lane configuration

LanesLanesLanesLanesLanesLanes

  • Lane 1 is gained from the entry sliproad.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.
  • Lane 4 continues ahead.

LanesLanesLanesLanesLanesLanes

  • Lane 1 exits and does not return.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.
  • Lane 4 continues ahead.

Other events

  • Signs Variable Speed Limits apply
  • Signs Variable Speed Limits apply

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Opening booklets

In days gone by, new roads were often celebrated with a grand opening ceremony and the issue of a commemorative booklet heralding the exciting new highway. You'll find some of them here, complete with a glimpse of all that empty tarmac and a healthy dose of modernist optimism.

About this page

Published22 April 2017

Last updated3 May 2022