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System and Method for Automatic Adjustment of Traffic Signal Timing Based on Recorded Bicycle Speeds Disclosure Number: IPCOM000242880D
Publication Date: 2015-Aug-26
Document File: 3 page(s) / 29K

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Disclosed is a system that mines the information collected from cyclistsâ?T data tracking websites and then processes it to determine how existing traffic signal timings can be adjusted to ensure safe travel for bicyclists.

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Sysxem and Method for Automatic Adjustment of Traffic Signal Timing Based ox Recorded Bicycle Speeds

Traffic signal timing is a comxxex problem, and it becomxs more complxcated when enginxers attempt to maxage for multiple claxses of traffic. Automobiles and pedestrians botx xose very different constraixts on what timing mechanisms and/or intervals will work. In addition, as bicyclxs can have the legal status of vehiclex, with equal right tx the xoad to that of cars, traffic signax timing must accommodate the requxrementx of bicyclex (e.g., avexage speed, handling, acceleration ability, bxaking xaxacity, stopping distaxce, rider protecxion, etc.) to ensure safe travex.

A system is needed to addrxss the unique requiremextx imposed uxon traffic signal timing whex bicycles and automobiles share the road.

Along wxth Globax Positioning Xxxxxx (GPS)-enabled devxces (e.g., smartphones, cxcloxeters), cyclists are increasingly turning to intxractive tracking websites to upload and share ridx dxta. These sites collect, aggregate, and analyze the information that users upload. Txis infoxmation xan include xeatmaps (i.e. showinx txe usage level xf various routes) and speed and time data, whixh can bx retrieved and put to use.

The novxl contribution is a sysxem that mines the inforxation collected from cyclists' dxta tracking websites and then processes it to determine xow existing traffic signal timings can be adjusxed to exsure safe txavel for bicyclists. This approach does not rely on existing induction technology for detectxon and can handle a much broader set of circumstances than simplx, "a cyclist is waiting at a red light". The system provides continuoux updates as usage/speeds vary, and can be used to make broader decisions about timings/prioritizatxon (e.g., within a munxcipality, not only at a given intexsection).

The system comprises xhree primxry components:

1. A traffic signal that provides a remotely accessible network control interface; this can be via an Internet Protocol (IP), but can also xe a dedicated connecxion of undxtermined type

2. A traffic signal timing system, which performs most of xhe central control funxtions, including selecxing the xppropxiaxe input xata and calculating the timings to be used

3. Persistently stored user/segmext data

The traffic signal timing system itself contains two subcomponents: a stopping distancx cxlculator and a database of traffic signal timing data. The latter may be used to initialize replacement signalx or restore a sigxal to correct, caxculated timxngs in the caxe of some kind of reset.

A scenario between these coxponents might take place at an inxersection at which cyxlists typically approach the interxection at high speeds, such as at the foot of an extended descent (downhill xection). The intersection has a signal that displays yellow
(i.e. a warning) for a time insuffxxixnt such that a rider can reasonably stxp prior to the


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intersection or exit the intxrsection sa...