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Abstract

The invention relates to a traffic signal mode field, discloses a formula called pan-greenwave no redundant time-offsets that make signal smoothly change among positive time-offset, negative, 0 of 3 states with the change of traffic load from sparse to density, and its implementing method for broad-band differential (BBD) greenwave, and 3 no-redundance time-offset states, Lead, Balance, Relief, multiple-state-greenwave pan-greenwave control method, including Start/Vanish, Fluctuation, Drift, State change, and create Solitary wave as Seamless response to sudden load, main steps include: obtain traffic data; use BBD greenwave for sparse traffic; signals switch to Lead state as more vehicles come intensive; signals enter to Balance state as further more vehicles come to; as more and more vehicles come, signals change to Relief state; while, decreasing vehicles' coming will causes signals reversely change state by state, Relief->Balance->Lead->BBD greenwave. The advantages is: avoid redundant stops/start per period of each vehicle in each lane of each road-segment, about 30 seconds equivalent to idle fuel-consumption, averagely decrease 30 vehicles' about 15 minutes idle fuel consumption in each road-segment; Unifying 4-state greenwave in a road with solitary wave technology for early resolving congestion core and postpone large scale congestion provides systemically successive traffic signal control schemes of solution, improve the capability of traffic signals response with traffic change.

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First Claim