Developing a short range vehicle to infrastructure communication system to enhance the safety at STOP sign intersections : final report.

Li, Qing; Qiao, Fengxiang; Wang, Xiaobing; Yu, Lei · 2016 · ROSA P / TranLIVE. University of Idaho

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Summary

This research addresses the persistent safety hazards at stop sign-controlled unsignalized intersections, where visibility issues and driver inattention contribute to a significant portion of fatal crashes. Despite existing engineering and policy strategies, drivers often fail to recognize stop signs due to physical obstructions or distractions such as fatigue or mobile phone use. To mitigate these risks, the authors developed a short-range Vehicle-to-Infrastructure (V2I) communication system known as the Drivers Smart Assistance System (DSAS). The primary objective was to enhance driver awareness and compliance through timely warnings, thereby improving safety and potentially reducing vehicle emissions by promoting smoother driving behaviors. The DSAS utilizes Radio Frequency Identification (RFID) technology to facilitate communication between roadside infrastructure and vehicles. The system comprises low-cost hardware, including active 2.4 GHz RFID tags mounted near stop signs and in-vehicle readers equipped with GPS and signal processors. When a vehicle approaches within a 500-foot read range, the system triggers an audio alarm and/or visual message to alert the driver. The study’s methodology involved an on-road pilot test conducted in a residential area in Houston, Texas. Twenty licensed drivers (10 males and 10 females) participated in the experiment, each driving a designated test route twice: once without the DSAS active and once with the system providing warnings. Performance metrics included speed profiles, acceleration rates, braking distances, and vehicle emissions, with the latter estimated using the EPA’s Motor Vehicle Emission Simulator (MOVES) model. The results demonstrated that the DSAS significantly improved driving performance at stop sign intersections. Drivers receiving warnings decelerated earlier and approached intersections with more stable speeds, minimizing fluctuations in acceleration and deceleration rates. Statistical analysis confirmed that the system enhanced the effective visibility of the stop sign, allowing for smoother braking maneuvers. Furthermore, the study found that the DSAS did not increase vehicle emissions; instead, it led to a slight reduction in emission rates during through movements, attributed to the smoother driving patterns induced by the warnings. Participant surveys indicated that the system was not confusing or stressful, and all drivers agreed that the warnings were clear and beneficial. The significance of this research lies in its validation of low-cost RFID-based V2I systems as a viable tool for enhancing intersection safety. By addressing the root causes of stop sign violations—specifically visibility and awareness—the DSAS offers a practical solution that complements traditional traffic control devices. The findings suggest that such systems can simultaneously improve safety outcomes and environmental performance by reducing erratic driving behaviors. The authors recommend further testing with larger participant groups and varied routes to generalize these observations, highlighting the potential for broader implementation of smart assistance technologies in intelligent transportation systems.

Key finding

The DSAS warning system enabled drivers to decelerate earlier and maintain stable speeds at stop sign intersections without increasing vehicle emissions.

Methodology

on_road

Sample size: 20

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).

Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• v2x connected vehicle
• vru facing ehmi
• signage environment