Sub-problem 2b: Analyzing the Effects of Signal Phasing
Step 2: Results
There is 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:
|
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 |
|||||