Table 1 A real-life setting of model parameters
Parameter | Description | Value |
|---|---|---|
Bound | The percentage of upper and lower bounds of the uniform distribution | variable: 1%, 3%, |
representing the time taken by the tram to travel an ordinary segment of the line: | 5%, 7%, 10%, | |
LowerBound=(ol/AverageVelocity)∗(1−Bound), and | and 15%. | |
UpperBound=(ol/AverageVelocity)∗(1+Bound). | ||
Epsilon | The maximum error on the tram position calculated by the LDS system (Accuracy) | variable: 1, 3, 5, and 10. |
TMax | The maximum time that a tram can wait in front of a tram signal | variable: 4, 8, 12, 16, |
before contacting the OCC | and 20. | |
p | Probability that a message does not arrive at its destination | variable: 0, 0.001, 0.003, |
0.005, and 0.01. | ||
av | The starting time interval between the trams | variable: 20 and 30 s. |
AverageVelocity | Average tram speed | 14.0 m/s |
RateIXL | IXL processing time in response to connection request and route request messages | 0.1 s |
RateNetwork | Time of transmission of a message from OBCU to IXL or from IXL to OBCU | 0.08 s |
Delay | The additional delay accumulated by a tram following the activation of the manual procedure | 120 s |
lentc | The length of Track Circuit | 45 m |
nl | The total number of segments | 569 |
nt | The total number of trams | 36 |
ol | The length of the ordinary segment | 50 m |
rrtotl | The distance between the Route Request Tag and the tram signal | 85 m |
pt | The time at the tram platform | 20 s |