Caraoke: An E-Toll Transponder Network for Smart Cities

Electronic toll collection transponders, e.g., E-ZPass, are a widely-used wireless technology. About 70% to 89% of the cars in US have these devices and some states plan to make them mandatory. As wireless devices however, they lack a basic function: a MAC (Medium Access Protocol) protocol that prevents collisions. Hence, today, they can be queried only with directional antennas in isolated spots. However, if one could interact with e-toll transponders anywhere in the city despite collisions, it would enable many smart applications. For example, the city can query the transponders to estimate the vehicle flow at every intersection.

Provided by: Association for Computing Machinery Topic: Enterprise Software Date Added: Aug 2015 Format: PDF

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