CHAPTER 5. SIMULATION RESULTS
57
|
time |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
|
1 |
0.074 |
0.078 |
0.080 |
0.083 |
0.053 |
0.038 |
0.032 |
0.024 |
|
0.045 |
0.048 |
0.048 |
0.050 |
0.032 |
0.023 |
0.019 |
0.015 | |
|
~ |
0.052 |
0.055 |
0.056 |
0.059 |
0.037 |
0.026 |
0.022 |
0.017 |
|
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0- |
|
-6 |
0.026 |
0.028 |
0.028 |
0.029 |
0.019 |
0.013 |
0.011 |
0.008 |
|
7 |
0.053 |
0.056 |
0.057 |
0.060 |
0.038 |
0.027 |
0.023 |
0.017 |
|
9 |
0.080 |
0.085 |
0.086 |
0.090 |
0.057 |
0.041 |
0.034 |
0.026 |
|
11 |
0.108 |
0.114 |
0.116 |
0.121 |
0.078 |
0.055 |
0.046 |
0.035 |
|
∏3 |
0.032 |
0.034 |
0.035 |
0.036 |
0.023 |
0.016 |
0.014 |
0.011 |
|
15+16 |
0.922 |
0.978 |
0.995 |
1.037 |
0.663 |
0.469 |
0.394 |
0.301 |
Table 5.9: Spawn frequencies Wetstraat - Part 3
Tweekerkenstraat (edge-node 5) was closed for traffic when the vehicle count
was done.
The traffic light controllers marching and optim are modified to a cycle of 90 sec-
onds with 65 seconds green time on the wetstraat and 25 seconds green time on the
crossing streets. In the previous simulations for scenarios 1 and 2, the cycle was
divided into 4 periods, one for each direction. For the Wetstraat the cycle can be
divided in 2 periods, one for the Wetstraat and one for the crossing streets. This is
because the crossing streets are single direction streets. (Those controllers are im-
plemented in MorevtsMarchingW etstraatT LC and MorevtsOptimW etstraatT LC).
5.3.1 Best parameters
The parameters θ and φmin can be optimized for sotl-phase and sotl-platoon. The
φmin is the minimal period of time a traffic light has to keep the green light. The
results show that smaller values for φmin lead to better results (ATWT and waiting
queue). Suppose that one car is waiting on a crossing lane of the Wetstraat. After
a while he gets a green light for φmin seconds. On the Wetstraat a lot of cars are
waiting and its threshold θ is already reached, but they have to wait until the φmin
period is finished. This is why lower φmin values results in lower ATWT values.
The values of θ are also important to optimize the traffic flow. A higher θ
will result in a longer waiting time on the crossing lanes of the Wetstraat, because
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