2 N Coordination of traffic signals is needed when intersections are closely spaced. O Always true O Sometimes true O False 3 In the design of traffic signals, we may put the least priority to pedestrians especially when traffic volume is high (
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- The through movement passenger car equivalents (pcphpl) for each approach of Vine and Maple Streetsintersections obtained from a traffic survey as shown in the following diagram. Vine Street for NSmovements 1s 48 ft wide and Maple Street for EW movements is 60 ft wide. There are two throughmovement lanes and one left-tum lane in each approach. The yellow times for Vine Street and MapleStreet through movement and left-tum phases are 4 second and 3 seconds per g_hase, respectively. TheAll-red for each phase is 2.0 seconds and the ost time is 5 seconds per phase. Pedestrian walkmgspeed is 3.5 ft/sec. Assuming equal distribution of traffic on the two through-movement lanes in eachapproach and a saturation flow rate of 1,900 pcphpl. A 3-phase fixed timing signal plan (namely, aprotected left-turn phase, a NS phase, and an EW phase) is suggested.I) In the diagram, the through movement volume is for 2 lanes and left tum volume is for one-lane.2) Determine one N-S or E-W left tum phase on the…16 ut of age Which of the following occurs in Interrupted Flow Facilities? Select one: A. External interruptions exists B. Frequent signals and stop/yield signs C. Platoons of vehicles in traffic stream D. All of the above OE. B and C Next pageQUESTION 1 The approaches of a 4-leg signalized intersection are configured with 1 NB lane, 1 SB lane, 1 EB lane, and 1 WB lane and each of these lanes serves LT, TH, and RT movements. The following volumes and phasing are provided. approach EB WB NB SB movement LT TH RT LT TH RT LT TH RT LT TH RT volume 120 480 160 80 560 100 20 200 40 12 160 48 2 6 What is the critical sum for the EB/WB barrier?
- $1 $5 MAJOR STREET 42 lead-lag lag-lag none 46 BARRIER -Phase Number -Protected Movement 43 MINOR STREET LU Permitted Movement >-Pedestrian Movement BARRIER In this ring and barrier diagram, what sequencing is used for the protected left turns? lead-leadGiven an arterial with 20 consecutive signals, spaced at 1,500 ft with vehicles moving at 50 ft/s, which coordination scheme is the best: simultaneous, altenate, or double alternate? What cycle length should be used?How many numbers of conflict are present in a 4-legged intersection? a.12 b.8 c.4 d.6
- It is the shape that is formed with the repeated formation of sight line checks Unobstructed Region Clear Section Unobstructed Section Sight Envelope 3 A car checks the situation of the intersection by checking the cars from different legs of the intersection. What type of Sight Distance is this? Car SSD ASD SISD None of the aboveRING 1 RING 2 $1 2 сл lead-lag lag-lag MAJOR STREET none $2 $6 BARRIER Phase Number Protected Movement $3 MINOR STREET $4 = Permitted Movement Pedestrian Movement In this ring and barrier diagram, what sequencing is used for the protected left turns? lead-lead BARRIERQ5a. Otwebeweate has been selected as the capital of a newly created district. As the new District Engineer, the Chief and the elders of the town approach you and make a request for the installation of a traffic light at one of the key intersections with the reason that there is no single traffic signal in the town and the installation of one will lift the status of the town as a district capital. What will be your decision and how will you explain it to the Chief and elders