def __init__(self, ID, controlInterval):
'''Constructor(string, float)
Create a PVehicle representing a SUMOVehicle for the PlatoonManager. The controlInterval is only piped through
to the singelton platoon created by the vehicle.
'''
# vehicle ID (should be the one used in SUMO)
self._ID = ID
# vehicle state (is updated by platoon manager in every step)
self.state = pVehicleState(ID)
# store the vehicle's vTypes, speedfactors and lanechangemodes
self._vTypes = dict()
self._speedFactors = dict()
self._laneChangeModes = dict()
# original vtype, speedFactor and lanechangemodes
self._vTypes[PlatoonMode.NONE] = traci.vehicle.getTypeID(ID)
self._speedFactors[PlatoonMode.NONE] = traci.vehicle.getSpeedFactor(ID)
# This is the default mode
self._laneChangeModes[PlatoonMode.NONE] = 0b1001010101
# vTypes, speedFactors and lanechangemodes parametrizing the platoon behaviour
for mode in [
PlatoonMode.LEADER, PlatoonMode.FOLLOWER, PlatoonMode.CATCHUP,
PlatoonMode.CATCHUP_FOLLOWER
]:
self._vTypes[mode] = self._determinePlatoonVType(mode)
self._laneChangeModes[mode] = cfg.LC_MODE[mode]
self._speedFactors[mode] = cfg.SPEEDFACTOR[mode]
self._speedFactors[
PlatoonMode.NONE] = traci.vehicletype.getSpeedFactor(
self._vTypes[PlatoonMode.NONE])
# Initialize platoon mode to none
self._currentPlatoonMode = PlatoonMode.NONE
# the active speed factor is decreased as the waiting time for a mode switch rises
# (assuming that the main hindrance to switching is too close following)
self._activeSpeedFactor = cfg.SPEEDFACTOR[self._currentPlatoonMode]
# The switch impatience factor determines the magnitude of the effect
# that an increasing waiting time has on the active speed factor:
# activeSpeedFactor = modeSpecificSpeedFactor/(1+impatienceFactor*waitingTime)
self._switchImpatienceFactor = cfg.SWITCH_IMPATIENCE_FACTOR
# create a new platoon containing only this vehicle
self._platoon = Platoon([self], controlInterval)
# the time left until splitting from a platoon if loosing coherence as a follower
self._timeUntilSplit = cfg.PLATOON_SPLIT_TIME
# Whether split conditions are fulfilled (i.e. leader in th platoon
# is not found directly in front of the vehicle)
self._splitConditions = False
# waiting time for switching into different modes
self._switchWaitingTime = {}
self.resetSwitchWaitingTime()
def __init__(self, ID, controlInterval):
'''Constructor(string, float)
Create a PVehicle representing a SUMOVehicle for the PlatoonManager. The controlInterval is only piped through
to the singelton platoon created by the vehicle.
'''
# vehicle ID (should be the one used in SUMO)
self._ID = ID
# vehicle state (is updated by platoon manager in every step)
self.state = pVehicleState(ID)
# store the vehicle's vTypes, speedfactors and lanechangemodes
self._vTypes = dict()
self._speedFactors = dict()
self._laneChangeModes = dict()
# original vtype, speedFactor and lanechangemodes
self._vTypes[PlatoonMode.NONE] = traci.vehicle.getTypeID(ID)
self._speedFactors[PlatoonMode.NONE] = traci.vehicle.getSpeedFactor(ID)
# This is the default mode
self._laneChangeModes[PlatoonMode.NONE] = 0b1001010101
# vTypes, speedFactors and lanechangemodes parametrizing the platoon behaviour
for mode in [PlatoonMode.LEADER, PlatoonMode.FOLLOWER, PlatoonMode.CATCHUP, PlatoonMode.CATCHUP_FOLLOWER]:
self._vTypes[mode] = self._determinePlatoonVType(mode)
self._laneChangeModes[mode] = cfg.LC_MODE[mode]
self._speedFactors[mode] = cfg.SPEEDFACTOR[mode]
self._speedFactors[PlatoonMode.NONE] = traci.vehicletype.getSpeedFactor(self._vTypes[PlatoonMode.NONE])
# Initialize platoon mode to none
self._currentPlatoonMode = PlatoonMode.NONE
# the active speed factor is decreased as the waiting time for a mode switch rises
# (assuming that the main hindrance to switching is too close following)
self._activeSpeedFactor = cfg.SPEEDFACTOR[self._currentPlatoonMode]
# The switch impatience factor determines the magnitude of the effect
# that an increasing waiting time has on the active speed factor:
# activeSpeedFactor = modeSpecificSpeedFactor/(1+impatienceFactor*waitingTime)
self._switchImpatienceFactor = cfg.SWITCH_IMPATIENCE_FACTOR
# create a new platoon containing only this vehicle
self._platoon = Platoon([self], controlInterval)
# the time left until splitting from a platoon if loosing coherence as a follower
self._timeUntilSplit = cfg.PLATOON_SPLIT_TIME
# Whether split conditions are fulfilled (i.e. leader in th platoon
# is not found directly in front of the vehicle)
self._splitConditions = False
# waiting time for switching into different modes
self._switchWaitingTime = {}
self.resetSwitchWaitingTime()
class PVehicle(object):
'''
Vehicle objects for platooning
'''
def __init__(self, ID, controlInterval):
'''Constructor(string, float)
Create a PVehicle representing a SUMOVehicle for the PlatoonManager. The controlInterval is only piped through
to the singelton platoon created by the vehicle.
'''
# vehicle ID (should be the one used in SUMO)
self._ID = ID
# vehicle state (is updated by platoon manager in every step)
self.state = pVehicleState(ID)
# store the vehicle's vTypes, speedfactors and lanechangemodes
self._vTypes = dict()
self._speedFactors = dict()
self._laneChangeModes = dict()
# original vtype, speedFactor and lanechangemodes
self._vTypes[PlatoonMode.NONE] = traci.vehicle.getTypeID(ID)
self._speedFactors[PlatoonMode.NONE] = traci.vehicle.getSpeedFactor(ID)
# This is the default mode
self._laneChangeModes[PlatoonMode.NONE] = 0b1001010101
# vTypes, speedFactors and lanechangemodes parametrizing the platoon behaviour
for mode in [PlatoonMode.LEADER, PlatoonMode.FOLLOWER, PlatoonMode.CATCHUP, PlatoonMode.CATCHUP_FOLLOWER]:
self._vTypes[mode] = self._determinePlatoonVType(mode)
self._laneChangeModes[mode] = cfg.LC_MODE[mode]
self._speedFactors[mode] = cfg.SPEEDFACTOR[mode]
self._speedFactors[PlatoonMode.NONE] = traci.vehicletype.getSpeedFactor(self._vTypes[PlatoonMode.NONE])
# Initialize platoon mode to none
self._currentPlatoonMode = PlatoonMode.NONE
# the active speed factor is decreased as the waiting time for a mode switch rises
# (assuming that the main hindrance to switching is too close following)
self._activeSpeedFactor = cfg.SPEEDFACTOR[self._currentPlatoonMode]
# The switch impatience factor determines the magnitude of the effect
# that an increasing waiting time has on the active speed factor:
# activeSpeedFactor = modeSpecificSpeedFactor/(1+impatienceFactor*waitingTime)
self._switchImpatienceFactor = cfg.SWITCH_IMPATIENCE_FACTOR
# create a new platoon containing only this vehicle
self._platoon = Platoon([self], controlInterval)
# the time left until splitting from a platoon if loosing coherence as a follower
self._timeUntilSplit = cfg.PLATOON_SPLIT_TIME
# Whether split conditions are fulfilled (i.e. leader in th platoon
# is not found directly in front of the vehicle)
self._splitConditions = False
# waiting time for switching into different modes
self._switchWaitingTime = {}
self.resetSwitchWaitingTime()
def _determinePlatoonVType(self, mode):
'''_determinePlatoonVType(PlatoonMode) -> string
Returns the type ID corresponding to the given mode. Uses the vehicles vType and the global map PLATOON_VTYPES
between original and platoon-vTypes. If the original vType is not mapped to any platoon-vtypes,
the original vType is used for platooning as well
'''
global WARNED_DEFAULT
# original vType
origVType = self._vTypes[PlatoonMode.NONE]
if origVType not in cfg.PLATOON_VTYPES \
or mode not in cfg.PLATOON_VTYPES[origVType] \
or cfg.PLATOON_VTYPES[origVType][mode] is "":
if "default" in cfg.PLATOON_VTYPES and mode in cfg.PLATOON_VTYPES["default"]:
if rp.VERBOSITY >= 1 and not WARNED_DEFAULT[mode]:
warn(("Using default vType '%s' for vehicle '%s' (PlatoonMode: '%s'). " +
"This warning is issued only once.") %
(cfg.PLATOON_VTYPES["default"][mode], self._ID, PlatoonMode(mode).name))
WARNED_DEFAULT[mode] = True
return cfg.PLATOON_VTYPES["default"][mode]
else:
if rp.VERBOSITY >= 1 and not WARNED_DEFAULT[mode]:
warn(("No vType specified for PlatoonMode '%s' for vehicle '%s'. Behavior within " +
"platoon is NOT altered. This warning is issued only once.") % (
PlatoonMode(mode).name, self._ID))
WARNED_DEFAULT[mode] = True
return origVType
if rp.VERBOSITY >= 3:
report("Using vType '%s' for vehicle '%s' (PlatoonMode: '%s')." %
(cfg.PLATOON_VTYPES[origVType][mode], self._ID, PlatoonMode(mode).name))
return cfg.PLATOON_VTYPES[origVType][mode]
def getID(self):
'''getID() -> string
Returns the vehicle's ID corresponding to the ID of the associated SUMOVehicle.
'''
return self._ID
def getVType(self, mode):
'''getVType(PlatoonMode) -> string
Returns the vehicle type associated with the given platooning mode
'''
return self._vTypes[mode]
def getCurrentVType(self):
'''getCurrentVType() -> string
Returns the vehicle type associated with the currently active platooning mode
'''
return self._vTypes[self._currentPlatoonMode]
def setPlatoon(self, platoon):
'''setPlatoon(_platoon)
Sets the vehicle's platoon to the given.
'''
self._platoon = platoon
def getPlatoon(self):
'''getPlatoon() -> Platoon
Returns the vehicle's platoon.
'''
return self._platoon
def isLastInPlatoon(self):
'''isLastInPlatoon() -> bool
Returns whether the ego is the last vehicle in its platoon
'''
return self._platoon.getVehicles()[-1] == self
def setPlatoonMode(self, mode):
'''setPlatoonMode(PlatoonMode)
Assign this vehicle the vType corresponding to the given 'mode'
'mode' is from Globals.PlatoonMode Enum. (safety checks have to be done at caller site)
'''
if self._currentPlatoonMode == mode:
# do nothing mode is already chosen
return
if rp.VERBOSITY >= 3:
report("Vehicle '%s': Setting PlatoonMode '%s'" % (self._ID, PlatoonMode(mode).name))
if self._vTypes[mode] != self._vTypes[self._currentPlatoonMode]:
traci.vehicle.setType(self._ID, self._vTypes[mode])
# if self._speedFactors[mode] != self._speedFactors[self._currentPlatoonMode]:
# Safer to call always since active speed factor mechanism may have changed
# current speed factor from basic speedfactor
traci.vehicle.setSpeedFactor(self._ID, self._speedFactors[mode])
if self._laneChangeModes[mode] != self._laneChangeModes[self._currentPlatoonMode]:
traci.vehicle.setLaneChangeMode(self._ID, self._laneChangeModes[mode])
self.resetSplitCountDown()
self._splitConditions = False
self._currentPlatoonMode = mode
def getCurrentPlatoonMode(self):
''' getCurrentPlatoonMode() -> PlatoonMode
Returns the current platoon mode of the vehicle
'''
return self._currentPlatoonMode
def getSwitchWaitingTime(self, mode):
'''getSwitchWaitingTime(PlatoonMode) -> float
Returns the waiting time for a switch to the given mode.
'''
return self._switchWaitingTime[mode]
def addSwitchWaitingTime(self, mode, increment):
'''addSwitchWaitingTime(PlatoonMode, float) -> void
Increases the mode-specific waiting time for a switch, and decreases the active speed factor accordingly
'''
self._switchWaitingTime[mode] += increment
if rp.VERBOSITY >= 4:
report("Vehicle '%s' increases switch waiting time for %s to %s" %
(self._ID, mode, self._switchWaitingTime[mode]), 3)
self._setActiveSpeedFactor(self._switchWaitingTime[mode])
def resetSwitchWaitingTime(self, mode=None):
'''resetSwitchWaitingTime(PlatoonMode) -> void
Resets waiting time for a switch to a mode to 0. or, if mode==None, all times are reset to 0.
The active speed factor is also reset.
'''
if rp.VERBOSITY >= 4:
report("Vehicle '%s' resets switch waiting time." % self._ID, 3)
if mode is None:
for e in PlatoonMode:
self._switchWaitingTime[e] = 0.
else:
self._switchWaitingTime[mode] = 0.
self._resetActiveSpeedFactor()
def _setActiveSpeedFactor(self, switchWaitingTime):
''' setActiveSpeedFactor(float)
Sets the active speed factor derived from the current vType's speed factor. The higher the
switch waiting time, the lower the active speed factor (to induce a slowing down, which allows
to execute the switch safely)
TODO: This mechanism does not work on highways, where the vehicles maxspeed is determining
the travel speed and not the road's speed limit.
'''
self._activeSpeedFactor = cfg.SPEEDFACTOR[self._currentPlatoonMode] \
/ (1. + self._switchImpatienceFactor * switchWaitingTime)
traci.vehicle.setSpeedFactor(self._ID, self._activeSpeedFactor)
def _resetActiveSpeedFactor(self):
'''resetActiveSpeedFactor()
Resets the active speed factor to the mode specific base value
'''
self._activeSpeedFactor = cfg.SPEEDFACTOR[self._currentPlatoonMode]
if self._activeSpeedFactor is None:
assert(self._currentPlatoonMode is PlatoonMode.NONE)
self._activeSpeedFactor = self._speedFactors[self._currentPlatoonMode]
traci.vehicle.setSpeedFactor(self._ID, self._activeSpeedFactor)
def splitCountDown(self, dt):
'''splitCountDown(double)
Decreases the time until the vehicle is split from its platoon
'''
self._timeUntilSplit -= dt
if rp.VERBOSITY >= 4:
report("Time until split from platoon for veh '%s': %s" % (self._ID, self._timeUntilSplit))
return self._timeUntilSplit
def resetSplitCountDown(self):
'''resetSplitCountDown(double)
Resets the time until the vehicle is split from its platoon to PLATOON_SPLIT_TIME
'''
self._timeUntilSplit = cfg.PLATOON_SPLIT_TIME
def setSplitConditions(self, b=True):
''' splitConditions(bool) -> void
Sets whether splitConditions are satisfied.
'''
self._splitConditions = b
def splitConditions(self):
''' splitConditions() -> bool
Returns whether vehicle did not find its leader in its current platoon in this step.
'''
return self._splitConditions
def isSwitchSafe(self, targetMode, switchImpatience=0.):
'''isSwitchSafe(PlatoonMode, double) -> bool
Checks whether it is safe for this vehicle to continue in the target mode.
The parameter switchImpatience \in [0,1] indicates the emergency of the switch
and controls to which degree the vehicle is disposed to break harder than
its preferred decel.
'''
global vTypeParameters
# if target mode already equals the current, no safety check is required
if targetMode == self._currentPlatoonMode:
return True
# Check value of switchImpatience
if (switchImpatience > 1.):
if rp.VERBOSITY >= 1:
warn("Given parameter switchImpatience > 1. Assuming == 1.")
switchImpatience = 1.
elif (switchImpatience < 0.):
if rp.VERBOSITY >= 1:
warn("Given parameter switchImpatience < 0. Assuming == 0.")
switchImpatience = 0.
# obtain the preferred deceleration and the tau of the target vType
decel = vTypeParameters[self._vTypes[targetMode]][tc.VAR_DECEL]
tau = vTypeParameters[self._vTypes[targetMode]][tc.VAR_TAU]
speed = self.state.speed
# If time until switch decreases below 0, this indicates that a switch from platoon to normal mode is required
maxDecel = vTypeParameters[self._vTypes[targetMode]][tc.VAR_EMERGENCY_DECEL] * switchImpatience \
+ (1. - switchImpatience) * decel
# check whether a halt at the end of the lane would prohibit the switch to a lower deceleration
# TODO: restrict check to situations where a halt is really required
if vTypeParameters[self._vTypes[self._currentPlatoonMode]][tc.VAR_DECEL] > decel:
distToLaneEnd = traci.lane.getLength(self.state.laneID) - traci.vehicle.getLanePosition(self._ID)
if self.brakeGap(speed, maxDecel) > distToLaneEnd:
return False
# check whether the ego vehicle has a leader, which must be considered
if self.state.leaderInfo is None:
return True
leader = self.state.leader
gap = self.state.leaderInfo[1]
minGapDifference = vTypeParameters[self._vTypes[targetMode]][
tc.VAR_MINGAP] - vTypeParameters[self.getCurrentVType()][tc.VAR_MINGAP]
gap -= minGapDifference
if gap < 0.:
# may arise when minGap of target type differs
return False
if leader is None:
# This may occur if the leader is not connected, so no corresponding PVehicle exists
# I'm not sure if this is ever called, but wouldn't exclude the possibility
leaderDecel = traci.vehicle.getDecel(self.state.leaderInfo[0])
leaderSpeed = traci.vehicle.getSpeed(self.state.leaderInfo[0])
else:
leaderDecel = vTypeParameters[leader.getCurrentVType()][tc.VAR_DECEL]
leaderSpeed = leader.state.speed
# simplified safety check: consider leaderDecel = max(leaderDecel, decel) and compare brakegaps
leaderDecel = max(leaderDecel, decel)
leaderBrakeGap = PVehicle.brakeGap(leaderSpeed, leaderDecel)
headwayDist = speed * tau
followerBrakeGap = PVehicle.brakeGap(speed, maxDecel)
if rp.VERBOSITY >= 4:
report("leaderSpeed = %s" % leaderSpeed +
"\nleaderDecel = %s" % leaderDecel +
"\ngap = %s" % gap +
"\nleaderBrakeGap = %s" % leaderBrakeGap +
"\nspeed = %s" % speed +
"\ndecel = %s" % decel +
"\nfollowerBrakeGap = %s" % followerBrakeGap +
"\nheadwayDist = %s" % headwayDist)
# TODO: test without headway...
return gap + leaderBrakeGap - followerBrakeGap - headwayDist > 0
@staticmethod
def brakeGap(speed, decel):
'''_brakeGap(double) -> double
Return the break gap given a constant deceleration
'''
if decel <= 0.:
return float("inf")
return speed * speed / (2.0 * decel)
def __str__(self):
return "<PVehicle '%s'>" % self._ID
