Interim Advice Note IAN 93/07 "Driver Location Signs - Interim Performance Specification" can be viewed at either of the below locations:

HA Staff via the Highways Agency Portal

External Bodies

Chief Highways Engineer Memo CHE 194/07 is unfortunately only available online via the HA Portal intranet. If you wish to obtain a copy of CHE 194/07 please contact your local Highways Agency representative or email the TIM team.