Please answer question below and include all steps on how you got the answer
Transcribed Image Text:Version A. A highway section is determined to have a jam density of 230 veh/mi. A free-flow
speed of 65 mph. Answer the following questions:
(1) What is the flow when avg. speed is 50 mph?
(2) A traffic study provided the # of acceptance and rejection by different gap values,
shown in the Table below. What is the critical gap? Explain your answer. Hint: you can
find that gap value by inspection. No calculation is needed.
Gap
(second)
0.5
1
1.2
1.4
1.6
1.8
2
24
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5
#
Acceptance
0
2
5
5
6
14
20
25
26
30
40
42
48
50
54
53
60
67
68
70
75
80
#
Rejection
80
78
75
75
74
66
60
55
54
50
40
38
32
30
26
27
20
13
12
10
5
0
(3) This highway section crosses a minor road. Drivers from the minor road must seek
appropriate gaps to merge onto the highway. Traffic laws require that minor-road traffic
merge onto the outside lane of the highway. Traffic flow on that outside lane is found to
be 1,200 veh/h. How many cars can turn at most from the minor road per hour? Use the
critical gap you obtained from (2). Assume only one car can turn per gap.
speed of 65 mph. Answer the following questions:
(1) What is the flow when avg. speed is 50 mph?
(2) A traffic study provided the # of acceptance and rejection by different gap values,
shown in the Table below. What is the critical gap? Explain your answer. Hint: you can
find that gap value by inspection. No calculation is needed.
Gap
(second)
0.5
1
1.2
1.4
1.6
1.8
2
24
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5
#
Acceptance
0
2
5
5
6
14
20
25
26
30
40
42
48
50
54
53
60
67
68
70
75
80
#
Rejection
80
78
75
75
74
66
60
55
54
50
40
38
32
30
26
27
20
13
12
10
5
0
(3) This highway section crosses a minor road. Drivers from the minor road must seek
appropriate gaps to merge onto the highway. Traffic laws require that minor-road traffic
merge onto the outside lane of the highway. Traffic flow on that outside lane is found to
be 1,200 veh/h. How many cars can turn at most from the minor road per hour? Use the
critical gap you obtained from (2). Assume only one car can turn per gap.
