SUMO
Simulation of Urban MObility

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# TraCI/Multi-Entry/Multi-Exit Detectors Value Retrieval

## Command 0xa1: Get MeMeDetector Variable

ubyte | string
Variable | Multi-Entry/Multi-Exit Detector ID
--- | ---

Asks for the value of a certain variable of the named multi-entry/multi-exit (e3) detector. The value returned is the state of the asked variable/value within the last simulation step. Please note that for asking values from your multi-entry/multi-exit detectors with TraCI, you have to:

- define them
- set their frequency to 1s

The following variable values can be retrieved, the type of the return value is also shown in the table.

Overview Retrievable Multi-Entry/Multi-Exit Detector Variables
Variable | ValueType | Description
--- | --- | ---
id list (0x00) | stringList | Returns a list of ids of all multi-entry/multi-exit detectors within the scenario (the given DetectorID is ignored)
count (0x01) | int | Returns the number of multi-entry/multi-exit detectors within the scenario (the given DetectorID is ignored)
last step vehicle number (0x10) | integer | Returns the number of vehicles that have been within the named multi-entry/multi-exit detector within the last simulation step [#]; Note: This value corresponds to the vehicleSumWithin measure of multi-entry/multi-exit detectors.
last step mean speed (0x11) | double | Returns the mean speed of vehicles that have been within the named multi-entry/multi-exit detector within the last simulation step [m/s] Note: This value corresponds to the meanSpeedWithin measure of multi-entry/multi-exit detectors.
last step vehicle ids (0x12) | stringList | Returns the list of ids of vehicles that have been within the named multi-entry/multi-exit detector in the last simulation step
last step halting vehicles number (0x14) | int | Returns the number of vehicles which were halting during the last time step

## Response 0xb1: MeMeDetector Variable

ubyte | string | ubyte | <return_type>
Variable | Multi-Entry/Multi-Exit Detector ID | Return type of the variable | <VARIABLE_VALUE>
--- | --- | --- | ---

The respond to a "Command Get MeMeDetector Variable".

## Notes

- You can find some further description on multi-entry/multi-exit detectors

This page was last modified on 28 October 2011, at 11:55.