Determine whether this intersection for which data are provided below meets MUTCD Warrants 1, 2, and/or 3 for signalization. These data were collected using pneumatic tubes and the data were binned in 60-minute increments (15-minute data are not available). All approaches have one lane entering the intersection. For any warrants that are met, explain how the warrant was met (rules applied, hours in which the volume criteria were met, etc.). The major street speed limit is 45 mph, and the minor street speed limit is 25 mph. The minor street has only one approach (i.e. it is a “T” intersection.)

Question

What will be an ideal response?

Answer 1

1. Warrant 1: Eight-hour vehicular volume
a) Condition A: Table 8.1:
- Major street: 1 lane; Minor street: 1 lane
- Vehicles per hour on major street: 350 (using the 70% rule, as the major
street speed exceeds 40 mph)
- Vehicles per hour on minor street: 105 (using the 70% rule, as the major
street speed exceeds 40 mph)
- Only 5 hours satisfy Condition A: 5, 6, 7, 8, and 12.
- Condition not met.
b) Condition B: Table 8.2:
- Major street: 1 lane; Minor street: 1 lane
- Vehicles per hour on major street: 525 (using the 70% rule, as the major
street speed exceeds 40 mph)
- Vehicles per hour on minor street: 53 (using the 70% rule, as the major
street speed exceeds 40 mph)
- 8 hours satisfy Condition A: 5, 6, 12, 13, 14, 15, 16, and 17.
- Condition met.
Condition B is satisfied; therefore, Warrant 1 is satisfied.
2. Warrant 2: Four- hour vehicular volume
- Figure 8.7 (70 percent condition as speed exceeds 40 mph)
- 1 lane and 1 lane
- 75 vph is the lower threshold volume for a minor-street approach with one
lane
- Only one hour, Hour 6, falls above the line.
Warrant 2 is not satisfied.
3. Warrant 3: Peak hour
a) Condition A: no information about delay
b) Condition B: Figure 8.6
- 1 lane and 1 lane
- 100 vph is the lower threshold volume for a minor-street approach with
one lane
- None of the hours fall above the line.
Warrant 3 is not satisfied.