01764411

Component

https://annualmeeting.myt...nlineProgram/Details/15557

Passing Sight Distance (PSD) is crucial in the design of undivided two-lane highways. It has major implications on the safety and operational efficiency of roads. Existing PSD standards and models are based on simplistic assumptions and incorporate minimal road and vehicle characteristics. This research evaluates the adequacy of PSD standards in practice by comparing them with more realistic values from IPG CarMaker®, a commercial vehicle and traffic simulation software. Similar test variables are chosen to ensure an identical comparison between the simulation and standards. Additionally, the effect of the road gradient and road-tire friction on PSD is also analyzed by configuring the parameters in the simulation. High deviations of up to 52% are observed in the PSD values when compared to existing standards under different road conditions. In the latter half of the paper, an analytical model for PSD is proposed. This model allows the selection of parameters as well as the application of physical vehicle constraints. The deviations observed in PSD values obtained from this model are lower than 5% for the specified test cases simulated in the vehicle dynamics simulator and signify the importance of considering the microscopic behavior of a vehicle during a passing maneuver.

This paper was sponsored by TRB committee AKD10 Standing Committee on Performance Effects of Geometric Design.

TRBAM-21-04107

English

18p

2021

Transportation Research Board 100th Annual Meeting

Digital/other

Figures; References; Tables

Highway design; Passing sight distance; Simulation; Standards; Two lane highways; Vehicle dynamics

Design; Highways

Transportation Research Board Annual Meeting 2021 Paper #TRBAM-21-04107

TRIS, TRB, ATRI

Dec 23 2020 11:05AM