Sub-problem 1a: Analysis of the existing TWSC intersection
Step 2. Results
The HCM capacity analysis procedure for TWSC intersections produces the following results for each minor stream movement:
-
the capacity of the movement and the capacity of the lane or lanes
-
the delay for the movement and the weighted average delay for each lane
-
the 95th-percentile queue for each lane
- the level of service for each lane
For the input data that we are considering here, the results are summarized in Exhibit 1-9.
|
Exhibit 1-9.
U.S.
95/Styner Avenue-Lauder Avenue
(Dataset1) |
||||||||
|
Approach |
NB |
SB |
Westbound |
Eastbound |
||||
|
1 |
4 |
7 |
8 |
9 |
10 |
11 |
12 |
|
|
L |
L |
L |
|
TR |
L |
|
TR |
|
|
31 |
59 |
55 |
|
205 |
50 |
|
155 |
|
|
1,024 |
1,163 |
170 |
|
359 |
134 |
|
329 |
|
|
0.03 |
0.05 |
0.32 |
|
0.57 |
0.37 |
|
0.47 |
|
|
95% queue length (vehicles) |
0.09 |
0.16 |
1.31 |
|
3.39 |
1.56 |
|
2.41 |
|
Control delay (sec/veh) |
8.6 |
8.3 |
36.0 |
|
27.6 |
47.0 |
|
25.3 |
|
LOS |
A |
A |
E |
|
D |
E |
|
D |
|
Approach delay (sec/veh) |
-- |
-- |
29.3 |
30.6 |
||||
|
Approach LOS |
-- |
-- |
D |
D |
||||
The table shown above provides a substantial amount of information regarding the forecasted operation of the intersection, including the estimated capacity, v/c ratio, queue length, and delay. What information from the table is most relevant to our analysis?
Discussion:
Take a few minutes to review
the data presented in this table. Document what you consider to be some of
the key aspects of these results. When you are ready to continue, click
the continue button below to proceed.