Coordinated two-dimensional progression traffic signal system

Details Coordinated two-dimensional progression traffic signal system Coordinated two-dimensional progression traffic signal system

1996-10-22

1999-09-28

Hofsass, Jeffery

Communications: electrical

Traffic control indicator

340910, 340909, 340911, 340934, 340917, G08G 1095

Patent

active

059595531

ABSTRACT:
A method of controlling traffic signals on existing grid-like systems of avenues and crossing streets. Two phase traffic signals, red and green, wherein both phases are equal in duration and the amber interval is a part of the green interval. The coordinated two-dimensional progression traffic signal system requires simultaneous changes of the signal cycle at three levels of the designated grid plan. The duration of each phase of the signal cycle is determined by the time required to traverse two contiguous lengths of the optimum grid rectangle. A band length is determinable from the calculation of the duration of the phases and corresponds to the integral number of roadway intersections to be crossed by a vehicle. Between bands, adjacent band widths are in the reciprocal phase from one another. Between avenues, parallel band widths on adjacent avenues and streets are also in reciprocal phases from one another, and between interphases. Interfacing band ends are also in a reciprocal phasing sequence relation to one another, so as to produce a checkerboard pattern of alternating red and green phases of the traffic signals, shown in band interfaces mesh into one another in a saw tooth pattern..

REFERENCES:
patent: 5278554 (1994-01-01), Marton
patent: 5330278 (1994-07-01), Raswant

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