SpeedLimit Class Reference

A derived class to represent a speed-limit section on a road. More...

#include <SpeedLimit.h>

Inheritance diagram for SpeedLimit:

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Collaboration diagram for SpeedLimit:

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List of all members.

Public Member Functions
void	removeVehicle (Vehicle *pVeh)
	Removes a vehicle from a speed limit.
void	addVehicle (Vehicle *pVeh)
	Adds a vehicle to the speed limit.
double	getSpeedLimit ()
	SpeedLimit (int start, int end, double limit, bool DirPos)
	Constructor.
virtual	~SpeedLimit ()
	Destructor.
Private Attributes
double	m_SpeedLimit
	The speed limit for this segment.

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Detailed Description

A derived class to represent a speed-limit section on a road.

Definition at line 17 of file SpeedLimit.h.

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Constructor & Destructor Documentation

SpeedLimit::SpeedLimit	(	int	start,
		int	end,
		double	limit,
		bool	DirPos
	)

Constructor.

Definition at line 19 of file SpeedLimit.cpp.

References RoadSegment::m_Beginning, RoadSegment::m_DirPos, RoadSegment::m_End, and m_SpeedLimit.

{
        m_Beginning             = start;
        m_End                   = end;
        m_DirPos                = DirPos;
        m_SpeedLimit    = limit;
}

SpeedLimit::~SpeedLimit

(

)

[virtual]

Destructor.

Definition at line 28 of file SpeedLimit.cpp.

{

}

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Member Function Documentation

void SpeedLimit::removeVehicle

(

Vehicle *

pVeh

)

[virtual]

Removes a vehicle from a speed limit.

Parameters:

pVeh

The Vehicle to remove

Reimplemented from RoadSegment.

Definition at line 75 of file SpeedLimit.cpp.

References DriverModel::ClearSpeedLimit(), and Vehicle::getDriver().

{
        DriverModel* driver = pVeh->getDriver();
        driver->ClearSpeedLimit();
}

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void SpeedLimit::addVehicle

(

Vehicle *

pVeh

)

[virtual]

Adds a vehicle to the speed limit.

Parameters:

pVeh

The vehicle to add

This function adds a vehicle to a speed limit segment in the road. A new desired acceleration for the vehicle is created based on the type of vehicle. If, however, the vehicle's desired acceleration is below that of the speed limit, then the desired acceleration does not change

Reimplemented from RoadSegment.

Definition at line 47 of file SpeedLimit.cpp.

References CIDMParameterSet::get_V0(), Vehicle::getDesiredVel(), CParameter::getDistribution(), Vehicle::getDriver(), Vehicle::getID(), RoadSegment::getIDMParams(), CDistribution::getLocation(), KM_PER_H_TO_M_PER_S, m_SpeedLimit, and DriverModel::SetSpeedLimit().

{
        double curV0 = pVeh->getDesiredVel();
        double newV0 = curV0;   // set limit to current V0 if curV0 < limit

        // do we need to generate a new lower V0?
        if(curV0 > m_SpeedLimit)
        {
                WORD veh_id = pVeh->getID();
                CIDMParameterSet* paramSet = getIDMParams(veh_id);
                CParameter V0 = (*paramSet->get_V0());
                // Initial method - generate new V0
                //newV0 = V0.GenKeepingCoV(m_SpeedLimit)*KM_PER_H_TO_M_PER_S;
                // revised method - keep ratio of v0/location constant
                double meanV0 = (V0.getDistribution()->getLocation()*KM_PER_H_TO_M_PER_S);
                double v0ratio = curV0/meanV0;
                newV0 = v0ratio * m_SpeedLimit;
                //TRACE("***Speed limit - m_SpeedLimit: %f\tcurV0: %f\tmeanV0: %f\tv0ratio: %f\tnewV0: %f\n",m_SpeedLimit, curV0, meanV0, v0ratio, newV0);
        }
        // this method allows for other driver models
        DriverModel* driver = pVeh->getDriver();
        driver->SetSpeedLimit(newV0);   // always call this function, even if not changing V0
}

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double SpeedLimit::getSpeedLimit

(

)

Definition at line 33 of file SpeedLimit.cpp.

References m_SpeedLimit.

{
        return m_SpeedLimit;
}

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Member Data Documentation

double SpeedLimit::m_SpeedLimit [private]

The speed limit for this segment.

Definition at line 28 of file SpeedLimit.h.

Referenced by addVehicle(), getSpeedLimit(), and SpeedLimit().

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The documentation for this class was generated from the following files:

• D:/~Research/Code/C++/EvolveTraffic/SpeedLimit.h
• D:/~Research/Code/C++/EvolveTraffic/SpeedLimit.cpp