Division on Visual Impairments

VIDBE-Q 63.4 Fall 2018

A quarterly newsletter from the Council for Exceptional Children's Division on Visual Impairments containing practitioner tips for Teachers of Students with Visual Impairments, Certified Orientation and Mobility Specialists, and other professionals.

Issue link: http://dvi.uberflip.com/i/1033568

Contents of this Issue

Navigation

Page 17 of 74

17 VIDBE-Q Volume 63 Issue 4 Fig. 1: Components of the PedPal Safe Intersection Crossing System The second element of our approach builds on innovative new technology for real-time adaptive traffic signal control. The Surtrac system combines artificial intelligence with traffic theory to provide, for the first time, real-time optimization of traffic flows in complex urban road networks, where (in contrast to suburban corridors) there are multiple, competing dominant traffic flows that change through the day. Surtrac takes a decentralized, collaborative online planning approach to signal control. Each intersection independently senses its locally approaching traffic and generates in real- time a signal timing plan that moves sensed traffic through the intersection so as to minimize cumulative wait time. Intersections then share their plans with downstream neighbors to achieve coordinated behavior at the network level. In the field, Surtrac shows reductions of 25% in travel times, 30% in number of stops and 40% in wait times. In the current context, surtrac provides the ability to adjust signal timing plans on a second by second basis.

Articles in this issue

view archives of Division on Visual Impairments - VIDBE-Q 63.4 Fall 2018