Post on 10-Jun-2020
transcript
Yinhai Wang and Yifan Zhuang
PacTrans STAR LabUniversity of Washington
Email: yinhai@uw.edu Tel: (206) 616-2696
March 1, 2018
Smart Road Stickers for Traffic Safety and Efficiency
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Background
Image source: NHTSA, 2013 Crash Overview, accessed online at http://www-nrd.nhtsa.dot.gov/Pubs/13WPPP.pdf
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Traffc Fatality Increases
Traffic deaths jumped 8.4% nationally in 2015， ending a five-decade trend! The number further ncreased by 5.6% in 2016. What caused this increase?Image source: http://www.chicagotribune.com/news/nationworld/ct-traffic-deaths-up-20150817-story.html
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Traffic Safety in WA
4Source: Washington Strategic Highway Safety Plan 2016. Accessed online at https://www.wsdot.wa.gov/NR/rdonlyres/5FC5452D-8217-4F20-B2A9-080593625C99/0/TargetZeroPlan.pdf
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Pedestrian Safety Challenges
5Source: Washington Strategic Highway Safety Plan 2013. Accessed online at https://www.wsdot.wa.gov/NR/rdonlyres/5FC5452D-8217-4F20-B2A9-080593625C99/0/TargetZeroPlan.pdf
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Connected Vehicles Can Help
6Image source: http://www.intellidriveusa.org/benefits/future-vision.php
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Connected Vehicles
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Image source: USDOT, Beyond Traffic: The Smart City Challenge.
Connected vehicle data supports
advanced traffic signal operations
Transit vehicles leverage connected vehicle
technologies for transit signal priority
Data collected from connected vehicles
provide insights into the performance of the city
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ASCE CAV Impact Committee
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Key Challenges for CVs How to Connect
V2V V2I V2X
What to Communicate Security Services for Applications and Management
Messages (IEEE 1609.2-2016) Standard Message Set Dictionary (SAE J2735) Wireless Access in Vehicular Environments (WAVE)
How to Manage and Use CV Data Safety Improvement Operational Efficiency and Reliability 9
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Key Challenges for CVs
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Source: http://cdn.electronics-eetimes.com/electronics-eetimes.com/sites/default/files/images/01-picture-library/ChristophHammerschmidt/2016-04-April/NXP_V2X/pic1.jpg
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Technology Development and Applications
Smart Road Stickers Similar in nature and form to a typical road
stud/pavement marker Cheap and easy to manufacture Capable of two-way communication Energy efficient Controllable and does V2I and V2X Light-emitting when needed
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Technology Development and Applications
智慧路贴
路贴主结点
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13CAV Testbed in the Smart Cities Context
Technology Development and Applications
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Technology Development and Applications
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Development of Devices and Software
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Crash Prediction Algorithm• The computation method to find the conflict point is developed
𝑥𝑥𝑐𝑐 =�𝑦𝑦𝑣𝑣 − 𝑦𝑦𝑝𝑝� − �𝑥𝑥𝑣𝑣 tan(𝜃𝜃𝑣𝑣) − 𝑥𝑥𝑝𝑝 tan�𝜃𝜃𝑝𝑝��
tan�𝜃𝜃𝑝𝑝� − tan(𝜃𝜃𝑣𝑣)
𝑦𝑦𝑐𝑐 =�𝑥𝑥𝑣𝑣 − 𝑥𝑥𝑝𝑝� − �𝑦𝑦𝑣𝑣 cot(𝜃𝜃𝑣𝑣) − 𝑦𝑦𝑝𝑝 cot�𝜃𝜃𝑝𝑝��
cot�𝜃𝜃𝑝𝑝� − cot(𝜃𝜃𝑣𝑣)
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More Field Test Expected
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Thanks for your attention!
AcknowledgmentThanks to the UW STAR Lab research team. The presented projects were partly funded by Washington State Department of Transportation (WSDOT) and PacTrans. We appreciate their funding support!