This is more or less consistent through all the countries and all vehicle categories and it is valid up to a speed of 80 km/h per hour. National differences are very small. The most effective intervention: Assistance systems like distance warning and adaptive cruise control should support optimised time headway with respect to speed. Campaigns should on no account focus on time headway in general, but on its adoption to speed. And further research is needed, how exactly drivers choose time headway.
In any case, PTW riders in general do not have to worry about being followed too closely by cars, which also means that further research must investigate other reasons than short time headway for rear-end collisions.
The post The findings in terms of time headway are rather alarming: Although it is strongly recommended to increase time headway with speed (even measured in time, not in meters) people obviously do the opposite as confirmed by both methods UDRIVE data and Austrian site-based speed data. This is more or less consistent through all the countries and all vehicle categories and it is valid up to a speed of 80 km/h per hour. The most effective intervention: Distance warning and adaptive cruise control. Public campaigning could raise awareness on the issue. appeared first on UDrive Results.