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SPEED PROFILES IN STREETS WITH SPEED REDUCING MEASURES

D Westland

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Abstract

Speed profiles have been measured for test persons, driving in their own cars, with starting and finishing speeds varying between 0 and 40 km/h and distances varying from 20 to 100 m. Relationships for speed profile parameters (location and value of the highest spot-speed and journey-speed) with 'hump'-speed and 'hump'-distance have been developed in order to optimize design and measurement. The speed-time-profile could be approached with a trapezium. For equal 'hump'-speed the highest speed can be measured at 0.6 times the hump distance behind the first hump. For the covering abstract of the conference see IRRD 286502. (TRRL)

About this research paper

What this paper is about

Speed profiles have been measured for test persons, driving in their own cars, with starting and finishing speeds varying between 0 and 40 km/h and distances varying from 20 to 100 m. Relationships for speed profile parameters (location and value of the highest spot-speed and journey-speed) with 'hump'-speed and 'hump'-distance have been developed in order to optimize design and measurement. The speed-time-profile could be approached with a trapezium. For equal 'hump'-speed the highest speed can be measured at 0.6 times the hump distance behind the first hump. For the covering abstract of the conference see IRRD 286502. (TRRL)

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Available abstract

Speed profiles have been measured for test persons, driving in their own cars, with starting and finishing speeds varying between 0 and 40 km/h and distances varying from 20 to 100 m. Relationships for speed profile parameters (location and value of the highest spot-speed and journey-speed) with 'hump'-speed and 'hump'-distance have been developed in order to optimize design and measurement. The speed-time-profile could be approached with a trapezium. For equal 'hump'-speed the highest speed can be measured at 0.6 times the hump distance behind the first hump. For the covering abstract of the conference see IRRD 286502. (TRRL)

Key concepts: Speed measurement, Traffic speed, Measure (data warehouse), Rotational speed, Speed limit, Preferred walking speed, Speedup, Gear ratio

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