Measuring trajectories and fuel consumption in oscillatory traffic: experimental results

Fangyu Wu (1) , Raphael Stern (1) , Miles Churchill (1) , Maria Laura Delle Monache (2, 3) , Ke Han (4) , Benedetto Piccoli (3) , Daniel B Work (1)

1 Department of Civil and Environmental Engineering [Urbana]
2 NECS - Networked Controlled Systems
3 Department of Mathematical Sciences [Camden]
4 Department of Civil and Environmental Engineering [Imperial College London]

This article presents data collected through a set of experiments with nine to 10 vehicles driving on a ring road constructed on a closed track. Vehicle trajectory data is extracted via a series of vision processing algorithms (for background subtraction, vehicle identification, and trajectory extraction) from a 360-degree panoramic camera placed at the center of the ring. The resulting trajectory data is smoothed via a two-step algorithm which applies a combination of RLOESS smoothing and regularized differentiation to produce consistent position, velocity, and acceleration data that does not exhibit unrealistic accelerations common in raw trajectory data extracted from video. A subset of the vehicles also record real-time fuel consumption data of the vehicles using OBD-II scanners. The tests include both smooth and oscillatory traffic conditions, which are useful for constructing and calibrating microscopic models, as well as fuel consumption estimates from these models. The results show a an increase in fuel consumption in the experiments in which traffic oscillations are observed as compared to experiments where vehicles maintain a smooth flow. However, this is partially due to the higher average speed at which vehicles travel in the experiments in which oscillatory traffic is observed. The article contains a complete, publicly available dataset including the video data, the extracted trajectories, the smoothed trajectories, and the OBD-II logs from each equipped vehicle. In addition to the dataset, this article also contains a complete source code for each step of the data processing. It is the first of several experiments planned to collect detailed trajectory data and fuel consumption data with smooth and unsteady traffic flow in a controlled experimental environment.

Domaines: Vision par ordinateur et reconnaissance de formes [cs.CV]; Algorithme et structure de données [cs.DS]

Fangyu Wu, Raphael Stern, Miles Churchill, Maria Laura Delle Monache, Ke Han, et al.. Measuring trajectories and fuel consumption in oscillatory traffic: experimental results. TRB 2017 - Transportation Research Board 96th Annual Meeting (TRB 2017), Jan 2017, Washington, DC, United States. pp.14. ⟨hal-01516133⟩