|
| |
|
Sub-problem 3b - Page 9 of 10 |
ID# C403B09 |
Sub-problem 3b: Ramps
Therefore, the analyses at Location I will be done with LA
increasing from 500 to 1,500 feet, while at Location J, LA will
remain at 3,000 feet (previously defined as LOS A). When the LA
at Location I is greater than 1,500 feet, we’ll assume that the on-ramp at I
continues as the third freeway lane and that length of the on-ramp at
Location J will be reduced. The results of these analyses are shown in
Exhibit 4-61. The extension
of the LA at Location I improves the LOS for the merge. When the
LA at Location J is at a minimum length (250 feet), it performs
at a LOS B. Further analyses show that to reach LOS A, the LA at
Location J would need to be at least 1,650 feet.
|
Exhibit 4-61. Variation of the Acceleration Lane
Lengths at Both Locations I & J |
LA at I
ft |
LA at J
ft |
Density at I
pcpmpl |
LOS at I |
Density at J
pcpmpl |
LOS at J |
|
500 |
3,000 |
21.8 |
C |
9.2 |
A |
|
1,500 |
3,000 |
15.5 |
B |
9.2 |
A |
|
2,500 |
250 |
9.2 |
A |
18 |
B |
|
2,500 |
1,650 |
9.2 |
A |
10 |
A |
[
Back ] [
Continue ] with Sub-problem 3b |
|
