Citation

Yano N, Mori K, Yokozeki T. Traffic Sci. 2023; 53(1): 58-66.

Copyright

(Copyright © 2023, Society for Traffic Sciences)

DOI

10.34398/kokaken.53.1_58

PMID

unavailable

Abstract

This study examined changes in vehicle running speeds before and after the speed limit was raised above 100 km/h on the Tohoku Expressway during 2016-2020. During the period, the speed limit was increased by 20 km/h, but increases in mean speeds were approximately 25% of the speed limit increase. Some drivers increased their speed in response to the raised speed limit, but others did not. 'Spillover effects' were observed: vehicle speeds sometimes increased in areas where the speed limit had not changed.

FINDINGS indicate the necessity of continual enforcement activities and countermeasures against excessive speeding.

Language: ja

Keywords

average speed; probe data; rate of speed limit violation; spillover effect; vehicle speed profile; スピルオーバー効果; プローブデータ; 平均速度; 規制速度超過率; 速度プロフィール