Modelling large vehicles operating speed characteristics on freeway alignment based on aggregated GPS data. Issue 8 (30th June 2020)

• Record Type: Journal Article
• Authors: Hou, Wei; Lyu, Nengchao; Liu, Zhaoxin; Wang, Xu
• Is Part Of: IET intelligent transport systems. Volume 14:Issue 8(2020)
• Page Start: 857
• Page End: 865
• Publication Date: 2020-06-30
• Subjects: road safety -- Global Positioning System -- traffic engineering computing -- road vehicles -- road traffic; actual vehicle speed -- theoretical speed operating downhill -- actual vehicle operating speed -- freeway alignment -- aggregated GPS data -- designed speed -- actual operating speed -- aggregated vehicle global positioning system datasets -- alignment conditions -- theoretical operating speed model -- traditional operating speed prediction model -- vehicle GPS data -- vehicle monitoring platform -- large vehicles operating speed characteristics modeling; Intelligent transportation systems -- Periodicals; Electronics in transportation -- Periodicals; 388.31205
• DOI: 10.1049/iet-its.2019.0563
• Languages: English
• ISSNs: 1751-956X

Abstract

Abstract : Operating speed is a basic measure for studying the safety of freeways. However, whether the designed speed matches the actual operating speed of large vehicles is worth studying. As such, this study included a large number of aggregated vehicle global positioning system (GPS) datasets used to analyse the actual speed of large vehicles under different alignment conditions on the freeway; and supplement the theoretical operating speed model. Using the traditional operating speed prediction model, the theoretical speed of each section was calculated. Two months of vehicle GPS data from freeways was extracted from a vehicle monitoring platform, the actual operating speed of each section was obtained. The similarities and differences between the theoretical operating speed and the actual vehicle speed on the horizontal and vertical curves were analysed and compared. The results indicate that the actual speed of large vehicles was obviously higher than the theoretical speed operating downhill. When the vehicle was operating uphill, the vehicle's actual speed was significantly lower than that of the theoretical speed. The actual vehicle operating speed data can be used as a new method for evaluating the safety of large vehicles on the freeway.