Signal Controlled Roundabouts
Local Transport Note 1/09
- Department for Transport (DfT)
This Local Transport Note seeks to provide assistance to those involved in the design and operation of signalised roundabouts. This includes roundabouts to which signals have been added, as well as junctions designed as signalised roundabouts from the outset.
This Local Transport Note does not deal specifically withurban gyratory systems (as opposed to large roundabouts).
Introduction - Purpose and structure of the Local Transport
Overview - History and development of signalised roundabouts in the UK
Reasons for use of signals at roundabouts - General, capacity, safety, changes, pedestrians and cyclists
Design Considerations - Preliminary full or partial signalisation, segregated left turns, full or part-time signalling, indirect control, pedestrian/cyclist facilities, signing and road markings
Assessment - Introduction, TRANSYT, LinSig, Microsimulation, PCMOVA
Control strategies - General, vehicle actuation, cableless linking, fixed-time UTC, SCOOT, MOVA, linking to ramp metering.
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