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<br /> ~~o~'"'_~,~.___,._, _ <br /> Warrant 10 - Peak Hour Delay. This Warrant applies to situations where traffic conditions are such <br /> that for one hour a day minor street traffic suffers undue delay in entering or crossing the major <br /> street. Undue delay is defined as four vehicle hours for a one lane approach and five vehicle hours <br /> for a two lane approach. <br /> Warrant II - Peak Hour Volume. This warrant also applies to situations where traffic conditions are <br /> such that for one hour a day minor street traffic suffers undue delay. It is similar to the four hour <br /> volume warrant except the hourly volumes needed to meet this warrant are even higher. <br /> .. Considerations For a Prol'ressive Sil'na] SYstem. <br /> The spacing between traffic signals has an impact on the ability to provide good signal progression <br /> t.. in both directions. Good signal progression will allow vehicles to travel in platoons at a uniform <br /> speed through the signalized intersections without having to stop at a red light. <br /> One of the keys to good signal progression in both directions is to have uniform signal spacing (that <br /> is, the same distance between signalized intersections). The more uneven the spacing the more likely <br /> there will be interruptions to the continuous flow of traffic on the major street, at least in one <br /> direction. <br /> The two factors which affect the progression speed (the speed that vehicles should travel to proceed ' <br /> through all intersections without stopping) are signal cycle length and .distance between signalized <br /> int.::rsections. If signals are more closely spaced it is more difficult to provide higher progression <br /> speeds with a wide green band width at the longer signal cycle lengths.that are needed on high <br /> volume arterials. If signals are spaced too far apart traffic will not stay together through the next <br /> intersection and therefore more traffic will end up stopping at the signalized intersections. Signals <br /> spaced at y, mile intervals provide for good signal progression on arterials at speeds of between 30 <br /> to 50 miles per hour depending on the cycle length. ShoTler cycle lengths will result in higher <br /> progression speeds. <br /> , ...-," <br /> \ <br /> ~ . . <br /> ~. <br /> ~ 4""-- <br /> . <br /> II 38 <br /> no <br />