Skip to content

TRIM: Platform-Independent Framework for Speed Trajectory Refinement in Emission Modeling

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.

View source

Similar papers

Aug 2026

Generating risk scenarios adverse to cooperative vehicle-infrastructure perception: An optimization-based framework.

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. · 0 citations
Open access Oct 2026

Validating car-following behaviors of autonomous vehicles by structural assessment with empirical data

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.

Jing-Biao Huo, Ke Ma · 0 citations
Sep 2026

Dynamics-informed causal inverse filtering for vertical track irregularity identification from multi-level vehicle accelerations

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. · 0 citations
Conference Open access Oct 2026

Radar-Based Evaluation of Car-Following Behavior and Fuel Consumption Across Vehicle Categories in SUMO

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 · 0 citations
Open access Sep 2026

Friction-Feasible Trajectory Prediction for Vehicles on Winter Roads: A Warm-Up Physics Loss with Velocity-Space Learning

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...

Xue-Mei Sun, Yi-Han Jiang, Si-Rui Zhang et al. · 0 citations

We use cookies to run the site and, with your consent, for analytics and to show ads. See our Cookie Policy.