Devices, commonly called 'spacers' (attached to the bicycle to discourage drivers from passing too close to the cyclist when overtaking) have been evaluated. Commercially available spacers usually consist of a plastic rod with either a flag or disc attached at the end. The overall length is about 0.4 m. Spacers are usually mounted horizontally on the rear offside of the bicycle so that they project toward overtaking traffic. They are widely used in Scandinavia but have only recently gained acceptance in the UK. By employing a specially developed ultrasonic ranging technique that allowed the easy measurement and recording of large numbers of gaps left by drivers overtaking a test cyclist it was possible to quantify precisely the effects of spacers of various types on drivers' overtaking behaviour. Measurements were taken on a variety of roads during the day and night. Results show that the percentage of overtaking vehicles passing less than 0.8 m from a test cyclist was approximately halved when using a spacer 0.5 m in length. A spacer 0.35 m long was only about half as effective. The effects of the 0.5 m long spacer were shown to be very similar to that of a fluorescent yellow jacket for discouraging close overtaking. (Copyright (c) Crown Copyright 1984.)


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Evaluation of Pedal Cycle Spacers


    Contributors:
    G. R. Watts (author)

    Publication date :

    1984


    Size :

    18 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Evaluation of pedal cycle spacers

    Watts, G. R. A. | SLUB | 1984


    Evaluation of pedal cycle spacers

    Watts, G. R. A. | TIBKAT | 1984