Analysis and prediction models for operating speed of vehicles in expressway superlong tunnels based on geometric and traffic related parameters

CONCLUSIONS: The influence of geometric parameters on vehicle operating speed in super long tunnels differs from that observed in non-tunnel roadways. The effects of the preceding or subsequent curve radius (Rb or Ra) of the tangent section, curvature (1/R), and curve degree (DC) are not important in this case. Furthermore, we find that the influence of the posted speed limit (PSL) is closely related to the driving scene and safety awareness of drivers. These findings can improve the design and joint evaluation of tunnel geometric parameters and traffic safety.PMID:35748658 | DOI:10.1080/15389588.2022.2087874
Source: Traffic Injury Prevention - Category: Accident Prevention Authors: Source Type: research