Automatisk hastighetsövervakning: hastighetsförlopp före och efter montering av kameraskåp på E4 mellan Iggesund och Hudiksvall

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Henrik Kronberg
Göran Nilsson

On behalf of Central Directorate of National Road Administration, VTI has described the speed profile between Iggesund and Hudiksvall before and after the installation of seven camera boxes for automatic speed enforcement. The boxes can be equipped with cameras, which take a front photo if the approaching car is driven with a speed exceeding the speed limit with 10 km/h.

The measurement method means that about 30 randomly selected cars have been followed in each direction by an instrumented car from VTI. The instrument in the car continuously registered the distance to the followed car and the speed of the instrumented car. Hereby the speed profile of the followed car is received for the road section. For every 50 meter of the road section the mean value for all followed cars is calculated and an aggregated speed profile is received.

The speed measurements verify that the mean speed on the experimental section decreased 6 to 7 km/h from June 1998 to June 1999. From June 1998 to June 2000 the mean speed decreasd with 4 to 5 km/h. At the same time decreased the speed variation. The use of the cameras has been very limited and on the same level during 1999 and 2000.

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