Aug 2026· Transportation Research Record· 0 citations· 24 references
Abstract
Traffic microsimulation routinely generates second-by-second speed trajectories that contain nonphysical fluctuations in acceleration and jerk, which can lead to systematic overestimation of vehicular emissions. This study presents Trajectory Refinement for Emission Modeling (TRIM), a platform-independent post-processing framework that refines microsimulated trajectories through physics-based optimization. By enforcing acceleration-dependent jerk constraints, car-following safety constraints, and trajectory-consistency within a mixed-integer quadratic programming formulation, TRIM transforms raw simulation outputs into physically plausible, emission-consistent trajectories. Validated against high-resolution unmanned aerial vehicle-derived ground truth under three car-following models (Wiedemann 99, Krauss, and the Intelligent Driver Model), TRIM reduces total emission errors within 9% for nitrogen oxides and 7% for PM
2.5
, with spatial errors predominantly within ±20% (±10% midblock). The platform-independent framework provides a transferable pathway for standardized emission assessment across simulation platforms, with an open-source implementation publicly available.
Existing approaches for concrete scenario generation and assessment primarily focus on trajectory-level interactions while neglecting physical perception constraints, such as sensor field-of-view limitations and occlusions from surrounding objects, leading to unrealistic risk representations. To fill this gap, this stu...
Yang Ma, Ming-Yuan Li, Ye Li et al.· Accident Analysis and Preven...· 0 citations
Using large-scale naturalistic autonomous vehicle trajectory data, an optimization-based calibration framework is developed that jointly estimates feedback delay in perception/decision and parasitic lag in actuation, and accommodates both linear constant-time-headway and nonlinear intelligent-driver-model controllers.
Track irregularity affects vehicle dynamic performance, ride quality and maintenance planning, yet its identification from vehicle responses remains challenging because the geometric excitation is embedded in coupled wheel–rail interaction and suspension dynamics. This study proposes a dynamics-informed causal inverse...
Shuai Qu, Yu-Hao Ren, Cheng-Jia Han et al.· Journal of Vibration and Con...· 0 citations
Results highlighting the importance of category-aware behavioral modeling when microsimulation outputs are used for energy and emissions assessment in mixed traffic highlight the importance of category-aware behavioral modeling.
Mahdi Al Abdraboh, Joshua A. Bittle· SUMO Conference Proceedings· 0 citations
Vehicle trajectory prediction on icy and snowy roads is safety-critical because reduced tyre–road adhesion compresses the set of dynamically feasible manoeuvres and can substantially increase braking distances relative to dry pavement. The objective of this study is to develop a lightweight physics-enhanced predictor t...