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Sub-problem 2b - Page 2 of 3 |
ID# C502B02 |
Sub-problem 2b:
Analyzing the Effects
of Signal Phasing
Step 2: Results
Referring once again
to the results of our initial analysis (see
Exhibit 5-23),
we see that there may be an
opportunity to combine improvements through phasing design, since the two
most deficient movements are the eastbound left and the southbound right.
This allows us to introduce a phase that implements a leading protected
left-turn phase eastbound that can run concurrently with a protected
right-turn phase southbound as shown here:
 |
Phase1 |
 |
Phase2 |
 |
Phase3 |
|
G = 10 sec |
G = 48 sec |
G = 12 sec |
|
Y = 4 sec |
Y = 4 sec |
Y = 4 sec |
|
R = 1 sec |
R = 1 sec |
R = 1 sec |
This phasing provides
more protected time to the most deficient movements to improve the overall
efficiency of the intersection, as illustrated in the results below:
|
Exhibit 5-25.
Museum Road at Reitz Union Drive (Leading EB Left) |
|
|
EB |
WB |
SB |
|
L |
T |
R |
L |
T |
R |
L |
T |
R |
|
Volumes |
380 |
670 |
- |
- |
595 |
180 |
205 |
- |
485 |
|
Queues (veh) |
11 |
19 |
- |
- |
34 |
34 |
15 |
- |
17 |
|
Delay |
21 |
6 |
- |
- |
17 |
17 |
55 |
- |
38 |
|
LOS |
C |
A |
- |
- |
B |
B |
E |
- |
D |
|
Intersection |
Delay |
22.0 |
LOS |
C |
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