|
Sub-problem 3a - Page 5 of 9 |
ID# C103A05 |
Sub-problem 3a: Oversaturated
Intersection Analysis
Step 2. Results
Exhibit 1-28 shows the results of evaluating the
performance of the existing U.S. 95/Styner-Lauder Avenue intersection when
the traffic volumes are at the peak level after a football game. As we
would expect, the delays and level of service estimated by the TWSC intersection
capacity model are high, almost unreasonably high. The heavy volumes on
the main street (U.S. 95) make it extremely difficult for any minor street vehicle
to enter the intersection. Capacities are estimated to be at or near zero. We should not be too surprised to see that the model is unable to estimate the
delays. For example, for the through and right-turn movements on both
minor street approaches, the volume/capacity ratios are 68.33 (westbound) and
75.00 (eastbound). Clearly the intersection can be expected to perform quite poorly during
these high volume periods.
|
Exhibit 1-28. Delay,
Queue Length, and Level of Service at Styner-Lauder -
Unsignalized Control (Dataset14) |
|
Approach |
NB |
SB |
Westbound |
Eastbound |
| Lane configuration |
L |
L |
L |
TR |
L |
TR |
| v (vph) |
215 |
59 |
55 |
205 |
50 |
450 |
| c (vph) |
256 |
656 |
0 |
3 |
0 |
6 |
| v/c |
0.84 |
0.09 |
|
68.33 |
|
75.00 |
|
95% queue length |
6.8 |
0.3 |
|
28.0 |
|
58.4 |
|
Control delay |
64.3 |
11.0 |
|
|
|
|
| LOS |
F |
B |
F |
F |
F |
F |
| Approach delay |
-- |
-- |
|
|
| Approach LOS |
-- |
-- |
|
|
How will the intersection perform under signal control?
[ Back ] [ Continue
] with Sub-Problem 3a
