CTM

A cell transmission model based on python.

Required package: numpy, pandas, xlrd, matplotlib

1. UrbanStreet

config(file: str) -> (List[node], List[link], List[signal])

Read the urban street data from an Excel file. The file contains sheets Node, Link and SignalControl. Argument file is the name of the file. In the file, if there are more than one value in a cell, separate it with a ';'.

2. ControlVector

ControlVector_Webster(Signal: List[signal], LenLink: int, TotalTimeStep: int, Time_SignalPeriod: List[int], LostTime: int) -> numpy.array[numpy.array[int]]

Generate a signal control matrix (LenLink * TotalTimeStep).

3.CTM

(1) Slice(Link: List[link], Node: List[node], Signal: List[signal], dt: int)

Split links into cells.

(2) CTM(Control: numpy.array[numpy.array[int]], Link: List[link], Node: List[node], dt: int, TotalTimeStep: int) -> numpy.array[numpy.array[float]] * 3

Model operations are performed by traversing the elements.

(3) CTM_matrix(Control: numpy.array[numpy.array[int]], Link: List[link], Node: List[node], dt: int, TotalTimeStep: int) -> numpy.array[numpy.array[float]] * 3

Model operations are performed by matrix operations. There will be warnings during execution, but it will be faster.