United States Department of Transportation
i
Feasibility of Real-Time Infrastructure-Driven Intervention for Improving Pedestrian Safety
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2023-10-01
[PDF-3.84 MB]
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Edition:Final report 11/1/22-10/31/23
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Abstract:The long-term objective of our research is to improve VRU safety in all neighborhoods in an inclusive and equitable way. For this project, we leverage the existing infrastructure in Chattanooga, TN (MLK Smart Corridor) to explore various wireless communication technologies for generating critical traffic notifications for both connected and nonconnected VRUs and vehicles in real time. More specifically, we implemented Software-Defined Radio (SDR)-based technologies on UTC campus and then evaluated them at two intersections within the Chattanooga Smart City testbed, Houston and Douglas. We employed two laptops and two SDRs to transmit and receive the signals. The receiver assumes the role of a pedestrian traversing the intersection with a laptop, SDR and an external GPS. Data collection is conducted for both LTE and BLE at each intersection. Our experiments and analysis effectively characterize the latency and reliability profiles of LTE and BLE in an urban environment through hexagonal binning visualizations and quantitative performance metrics. This furnishes critical insights into the real-world capabilities of these salient IoT protocols.
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