S9 Problem 7 15 points Which traffic signal warrants are sat

S9 Problem 7 (15 points) Which traffic signal warrants are satisfied if an intersection has the following characteristics? Major Street: 2 lanes At least 550 VPH sustained for eight hours of an average day At least 700 VPH sustained for four hours of an average day At least 850 VPH sustained for the peak hour of an average day Minor Street: 1 lane At least 100 VPH sustained for eight hours of an average day At least 250 VPH sustained for eight hours of an average day At least 550 VPH sustained for eight hours of an average day Pedestrians: At least 200 pedestrians per hour for four hours of an average day At least 450 pedestrians per hour for the peak hour of an average day School children are not using the crosswalks Other Characteristics: Signal is isolated and not considered to be part of a larger network There have been 5 rear-end crashes at the intersection in the past year The minor street crosses a railroad 130 ft away from the intersection

Solution

WARRANT 1: EIGHT-HOUR VEHICULAR VOLUME-

Section 4C.02 Warrant 1, Eight-Hour Vehicular Volume Support: 01 The Minimum Vehicular Volume, Condition A or A1, is intended for application at locations where a large volume of intersecting traffic is the principal reason to consider installing a traffic control signal. 02 The Interruption of Continuous Traffic, Condition B or B1, is intended for application at locations where Condition Ais not satisfied and where the traffic volume on a major street is so heavy that traffic on a minor intersecting street suffers excessive delay or conflict in entering or crossing the major street.

for major street with 2 lanes and minor street with 1 lane can have 900 VPH (Section 4C.02 of the MUTCD)

So our given conditions are satisfied which is (650 VPH for major street with 2 lanes and 350 VPH minor street with 1 lane .

Hence warrant 1 satisfied.

WARRANT 2: FOUR-HOUR VEHICULAR VOLUME-

Section 4C.03 Warrant 2, Four-Hour Vehicular Volume Support: 01 The Four-Hour Vehicular Volume signal warrant conditions are intended to be applied where the volume of intersecting traffic is the principal reason to consider installing a traffic control signal. Standard: 02 The need for a traffic control signal shall be considered if an engineering study finds that, for each of any 4 hours of an average day, the plotted points representing the vehicles per hour on the major street (total of both approaches) and the corresponding vehicles per hour on the higher-volume minor-street approach (one direction only) all fall above the applicable curve in Figure 4C-1 for the existing combination of approach lanes. On the minor street, the higher volume shall not be required to be on the same approach during each of these 4 hours.

According to Section 4C.03 of the MUTCD.

only 805 VPH allowed but we have 950 VPH so not satisfied.

Hence warrant 2 not satisfied.

WARRANT 3: PEAK HOUR-

Section 4C.04 Warrant 3, Peak Hour Support: 01 The Peak Hour signal warrant is intended for use at a location where traffic conditions are such that for a minimum of 1 hour of an average day, the minor-street traffic suffers undue delay when entering or crossing the major street. Standard: 02 This signal warrant shall be applied only in unusual cases, such as office complexes, manufacturing plants, industrial complexes, or high-occupancy vehicle facilities that attract or discharge large numbers of vehicles over a short time.

According to Section 4C.04 of the MUTCD.

only 805 VPH allowed but we have 1150 VPH so not satisfied.

Hence warrant 3 not satisfied.

WARRANT 4: PEDESTRIAN VOLUME-

Section 4C.05 Warrant 4, Pedestrian Volume Support: 01 The Pedestrian Volume signal warrant is intended for application where the traffic volume on a major street is so heavy that pedestrians experience excessive delay in crossing the major stree

According to Section 4C.05 of the MUTCD.

it satisfied the criteria for 4 hour and peak hour.

hence warrant 4 is applicaple.

WARRANT 5: SCHOOL CROSSING-

Not Considered

WARRANT 6: COORDINATED SIGNAL SYSTEM-

Not Considered

WARRANT 7: CRASH EXPERIENCE-

Section 4C.08 Warrant 7, Crash Experience Support: 01 The Crash Experience signal warrant conditions are intended for application where the severity and frequency of crashes are the principal reasons to consider installing a traffic control signal.

According to Section 4C.08 of the MUTCD.

If five or more reported crashes, of types susceptible to correction by a traffic control signal, have occurred within a 12-month period, each crash involving personal injury or property damage apparently exceeding the applicable requirements for a reportable crash warrant 7 is applicaple.

we have 7 rear end crash at intersection past year.

So warrant 7 is applicaple.

WARRANT 8: ROADWAY NETWORK-

Not Considered.

WARRANT 9: INTERSECTION NEAR A GRADE CROSSING-

Section 4C.10 Warrant 9, Intersection Near a Grade Crossing Support: 01 The Intersection Near a Grade Crossing signal warrant is intended for use at a location where none of the conditions described in the other eight traffic signal warrants are met, but the proximity to the intersection of a grade crossing on an intersection approach controlled by a STOP or YIELD sign is the principal reason to consider installing a traffic control signal.

According to Section 4C.10 of the MUTCD.

A grade crossing exists on an approach controlled by a STOP or YIELD sign and the center of the track nearest to the intersection is within 140 feet of the stop line or yield line on the approach , warrant 9 is applicaple.

we have railroad 130 ft away from intersection.

So warrant 9 is applicaple.