Do enough cars accumulate during red time at intersection 3 to back up any of th

Question

Do enough cars accumulate during red time at intersection 3 to back up any of the approaches beyond 150 feet for left turns or 250 feet for through or right turn lanes? Assume each car occupies 20 feet when stopped (16 feet long plus 4 feet of space) and uniform arrivals (volumes are given in vehicles/hour).

Southbound Right 250 Intersection 1 Lanes Through 500 R, T, T, L Left 250 100 Lanes Through 400 100 Westbound Right Eastbound eft 150 Lanes Through 500 T/R, T, L Right 200 Northboun Lanes T/R, T, L Left 200 Through Right 400 Intersection 2 Southbound Lanes T/R, T/L Right Through 600 Left 140 Westbound Right 100 Eastbound Left Lanes Through 150 Lanes Through 150 T/R/L Right 50 Northbound Lanes T/R, T/L Left Through Right 160 Intersection 3 Southbound Lans R R, T, T, L Left Through 500 750 200 Westbound Right 100 Eastbound Left 200 Lanes Through T/R/L 120 Lanes Through 50 200 T/R, T/ Right L, L, T, T/R Northbound Left 350 Lanes Through Right 50 Southbound Lanes T/R, T, L Through 620 Intersection 4 Right 175 30 90 40 Westbound Right 120 Lanes Through T/R/L Eastbound Left Lanes Through 150 T/R/L Right Left Northbound Lanes T/R, L ThroughRight 150 Left 100 650 Intersection 5 Southbound Lanes Through 350 R, T, L Left 150 200 200 Lanes Through 50 50 Westbound Right Eastbound Left 250 Lanes Through 100 T/R, L Right Left Northbound Lanes T/R/L Though Right 450 75

Explanation / Answer

No. based on the given dimensions of the approach roads and the given data of intersections and the vehicular movements, extension will not be required.

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