# Simulation/ParkingArea

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# Parking Areas

Areas for parking outside the road network (either road-side parking or car parks) can be defined using the <parkingArea> element. This accomplishes the following purposes:

• arbitrary parking positions and angles can be defined to visualize fishbone or parallel parking
• parking space outside the road network can be limited to a set capacity
• automatic rerouting to an alternative parking area can be triggered whenever a parking area becomes full

# Definition

A road-side parkingArea is defined as in the following:

```<parkingArea id="ParkAreaA" lane="a_0" startPos="200" endPos="250" roadsideCapacity="5" angle="45" length="30"/>
```

Additionally, individual parking spaces can be defined:

```<parkingArea id="ParkAreaB" lane="b_0" startPos="240" endPos="260" roadsideCapacity="0" width="5" length="10" angle="30">
<space x="853" y="623"/>
<space x="863" y="618"/>
<space x="873" y="613"/>
<space x="883" y="608"/>
<space x="893" y="603"/>
<space x="848" y="611" width="4" length="8" angle="120"/>
<space x="858" y="606" width="4" length="8" angle="120"/>
<space x="868" y="601" width="4" length="8" angle="120"/>
<space x="878" y="596" width="4" length="8" angle="120"/>
<space x="888" y="591" width="4" length="8" angle="120"/>
</parkingArea>
```

The total capacity of a parking area is given by the sum of its roadsideCapacity and the number of its <space> elements.

The parkingArea supports the following attributes:

Attribute Name Value Type Value Range Default Description
id string id The name of the parking area; must be unique
lane string valid lane id The name of the lane the parking area shall be located at
startPos float -lane.length < x < lane.length (negative values count backwards from the end of the lane) 0 The begin position on the lane (the lower position on the lane) in meters
endPos float -lane.length < x < lane.length (negative values count backwards from the end of the lane) lane.length The end position on the lane (the higher position on the lane) in meters, must be larger than startPos by more than 0.1m
friendlyPos bool true,false false whether invalid stop positions should be corrected automatically (default false)
name string simple String Arbitrary text to describe the parking area. This is only used for visualization purposes.
roadsideCapacity int non-negative 0 The number of parking spaces for road-side parking
onRoad bool false Whether vehicles remain on the road while parking.
Note:
If set to true, only roadSideCapacity is used and no <space>-definitions are permitted.
width float positive 3.2 The width of the road-side parking spaces
length float positive (endPos - startPos) / roadsideCapacity The length of the road-side parking spaces
angle float (degree) 0 The angle of the road-side parking spaces relative to the lane angle, positive means clockwise

## Custom parking spaces

The space element supports the following attributes:

Attribute Name Value Type Value Range Default Description
x float The x-position in meters of the parking vehicle
y float The y-position in meters of the parking vehicle
z float 0 The z-position in meters of the parking vehicle
width float width value of the parent parking area The width of the parking space
length float length value of the parent parking area The length of the parking space
angle float (degree) absolute angle of the parent parking area (lane angle + angle attribute) Absolute angle of the parking space

Caution:
Please note that parking areas must be added to a config via the --additional-files parameter (see additional-file).

# Letting Vehicles stop at a parking area

The declare a vehicle that stops at a parkingPlace, a <stop>-definition must be part of the vehicle or it's route:

```
<vehicle id="0" depart="0">
<route edges="e1 e2 e3"/>
<stop parkingArea="pa0" duration="20"/>
</vehicle>

```

What is defined here is a vehicle named "0" that stops as at parkingArea "pa0". Note, that the lane of that parking area must belong to one of the edges "e1, e2, e3" of the vehicles route.

For a complete list of attributes for the "stop"-element of a vehicle see Definition_of_Vehicles,_Vehicle_Types,_and_Routes#Stops.

# Rerouting when the current parkingArea is full

If a vehicle reaches a parkingArea that is filled to capacity it must wait on the road until a space becomes available or reroute to a new parking area.

# TraCI

Some information regarding parking areas can be accessed directly using traci.simulation.getParameter() calls.

• parkingArea.capacity: total number of parking spaces (roadsideCapacity + number of <space elements)
• parkingArea.occupancy: number of vehicles parking at this parking area