Site Updates

21st August 2017: IAN 198/17 added to IANs Page.

November 2017:

Design Manual for Roads and Bridges

BD 63/17 Inspection of Highway Structures
HA 37/17 Hydraulic Design of Road-Edge Surface Water Channels
HA 41/17 A Permeameter for Road Drainage Layers
HA 102/17 Spacing of Road Gullies
HA 105/17 Sumpless Gullies
TD 45/17 Detection on the Motorway and Trunk Road Network


For more information about pilots and trials on the Highways Agency network or the Guide itself please contact:

Max Brown (

Telephone: ++44 (0) 1173 728541

Highways Agency
Safety, Standards and Research Directorate
Temple Quay House
2 The Square
Temple Quay