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Random float netlogo driver#
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reactivity-time (default = 2s) : reactivity time in case of danger in second.Used to calculate security distance between cars.

max-accel-kmhs (default = 10 km/h/s) maximum of accelaration speed for all cars.

max-speed-kmh (default = 130 km/h) max-authorised speed for all cars : also used to calculate the maximum decelaration (max-speed-kmh / reactivity-time / frame-rate).

Random float netlogo Patch#

This parameter changes the length in m of each patch On the screen the length of the road is always the same.

road-length-m (default = 1000m) : length of the road in m.

frame-rate (default = 25) : used to make the conversion between time and ticks : number of images(ticks) per second.

number-of-lanes (default = 3) : number of lanes on the road.

Other parameters that can be changed with configuration file The auth-change-lane is a switch that enable or not cars to change lane (overtake or cut-back) This is a global parameter for all the cars but each car has a specific patience build from the formula : 2 + random max-patience

Random float netlogo driver#

The max-patience slider controls how many times a car can slow down or be under its expected speed before a driver loses their patience and tries to change lanes. rate-decel is a global parameter setup (see below) The formula for each car is "car deceleration" = "decelaration" * (1 + rate-decel * "random triangle"). This is a global parameter for all the cars but each car has a specific deceleration build from this deceleration time a triangle random deceleration (between 0 and 1). The deceleration slider controls the rate at which cars decelerate when there is a car close ahead.(unit km/h/s). rate-accel is a global parameter setup (see below) The formula for each car is "car accelerarion" = "acceleration" * (1 + rate-accel * "random triangle"). This is a global parameter for all the cars but each car has a specific acceleration build from this acceleration time a triangle random acceleration (between 0 and 1).

The acceleration slider controls the rate at which cars accelerate when there are no cars ahead.(unit : km/h/s). This is a SETUP parameter that can't be changed during the GO. The number-of-cars slider controls the number of cars on the road. This parameter can be changed during the GO phase

All the cars are created on theleft of the road. The flow-cars slider define the flow of created car in the "mode flow". The Flow? switch detemrine if we are on "mode flow" or "mode loop"

"One obstacle per lane" : one obstacle is randomly added to each lane to disturb the fow.

"Closed lane" : trucks are added to simulate a closed lane.

The truck-config chooser makes it possible to add pre defined "truck" configuration. The chooser / sliders / switch parameters are the following :

initialise the chooser truck-config to "None".

the fields available in this truck file are described in the truck_sample.txt file (exemple of a closed lane).

some parameters in the setup file can be changed after loading using sliders (see below sliders description).

never suppress a line or change the order of the parameters.

the fields available in this setup file are described in the config_sample.txt file.

it allows also to cancel the selection of configuration file and come back to "out of the box" way of playing.

it initialize all the values of sliders and chooser to default values.

should be used the first time using the simulation before setup.

the cars are created at tick 0 with the number of cars given by number-of-cars slider.

the car arriving at the end of the road start back at the beginning.

new cars are created depending on the flow-cars slider value.

the cars are killed at the end of the road.

įor both way of using it there are two simulation mode available :

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plus add specific vehicules to simulate close line, slow vehicules.ajust same parameters as in out of the box scenarios.Setup file : for more advanced built-in scenario GO once button drives the cars for just one tick of the clock.SETUP button to set up the lanes and the cars (3 lanes by default).adjust the parameters you want with the sliders (see below slider description) and the chooser (to choice "trucks").creation of a bottleneck when the road is totally closedįirst adjust the zoom to your screen so that you can see the whole road on your screen.impact of a closed lane (for instance the right lane) on the traffic.impact on the traffic of a slow car/truck on the first lane.In this actual version it is possible to simulate the following scenarios : It is a framework that can be updated to take in account different scenarios. This model aims at answering various questions regarding road traffic. Do you have questions or comments about this model?