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DMRB: Road Lighting CA 185 Vehicle speed measurement (formerly TA 22/81)
Publication Year
2019
Document Status
Current
Abstract
Provides requirements for measuring vehicle speeds and the 85th percentile speed on existing all-purpose trunk roads. Looks at spot speed and journey speeds, speed limits, traffic signal installations, other scheme types, free flow conditions, recording minimum vehicle numbers, speed measurement frequency, timing and measurement methods.
Document History
Road Layout. Appraisal. Supersedes TA 22/81 Assessment and preparation of road schemes. Assessment of road schemes. Vehicle speed measurement on all purpose roads (HA, 1981). Design manual for roads and bridges (DMRB).
Publisher Information
Highways England
Highways England is now known as National Highways and was responsible for the operation, maintenance and improvement of England's motorways and major A roads. It was an executive non-departmental public body, sponsored by the Department for Transport and was formerly known as Highways Agency.
National Traffic Operations Centre
3 Ridgeway
Quinton Business Park
Birmingham
HE
UK
Website: www.highways.gov.uk
Email: info@highwaysengland.co.uk
Tel: 0300 123 5000
