def test_json_back_and_forth(self) -> None:
""" test converting back and forth from and to json """
# GIVEN
input_dict = TestPeriodicOrderInputValidation.get_default_inputs()
# WHEN
periodic_order = PeriodicOrder(**input_dict)
# THEN converting back and forth should in the end give the same result
periodic_order_dict = periodic_order.to_json()
periodic_order_from_json = PeriodicOrder.from_json(
order_dict=periodic_order_dict)
self.assertDictEqual(periodic_order_dict,
periodic_order_from_json.to_json())
def test_successful_validation(self) -> None:
""" Test initializing PeriodicOrder object with correct input """
# GIVEN
input_dict = TestPeriodicOrderInputValidation.get_default_inputs()
# WHEN
PeriodicOrder(**input_dict)
def test_duplicate_ids(self) -> None:
""" Test that an error is raised when the same id is used multiple times """
# GIVEN
input_dict = TestPeriodicOrderInputValidation.get_default_inputs()
input_dict["order"].append("sg1")
# WHEN initializing the periodic order
with self.assertRaises(ValueError):
PeriodicOrder(**input_dict)
def test_subsequent_non_conflicting_ids_in_periodic_order(self):
# GIVEN
input_dict = TestInputValidation.get_default_inputs()
# WHEN
input_dict["periodic_orders"] = [PeriodicOrder(["sg1", "sg2", "sg3"])]
with self.assertRaises(ValueError):
Intersection(**input_dict)
def test_unknown_ids_in_periodic_order(self):
# GIVEN
input_dict = TestInputValidation.get_default_inputs()
# WHEN
input_dict["periodic_orders"] = [PeriodicOrder(["sg1", "sg2", "unknown_id"])]
with self.assertRaises(ValueError):
Intersection(**input_dict)
def get_default_inputs() -> Dict:
""" Function to get default (valid) inputs for Intersection() """
signalgroups = [SignalGroup(id=f"sg{i+1}", traffic_lights=[TrafficLight(capacity=1800, lost_time=1)],
min_greenyellow=10, max_greenyellow=80, min_red=10, max_red=80) for i in range(6)]
conflicts = [Conflict(id1="sg1", id2="sg2", setup12=1, setup21=2),
Conflict(id1="sg1", id2="sg6", setup12=1, setup21=2),
Conflict(id1="sg2", id2="sg6", setup12=1, setup21=2)]
sync_starts = [SyncStart(from_id="sg1", to_id="sg3")]
offsets = [Offset(from_id="sg1", to_id="sg4", seconds=10)]
periodic_orders = [PeriodicOrder(order=["sg1", "sg2", "sg6"])]
greenyellow_leads = [GreenyellowLead(from_id="sg1", to_id="sg5", min_seconds=1, max_seconds=10)]
greenyellow_trails = [GreenyellowTrail(from_id="sg5", to_id="sg1", min_seconds=2, max_seconds=8)]
return dict(signalgroups=signalgroups, conflicts=conflicts, sync_starts=sync_starts,
offsets=offsets, greenyellow_leads=greenyellow_leads, greenyellow_trails=greenyellow_trails,
periodic_orders=periodic_orders)
def _add_fixed_periodic_order(self, order: List[str]) -> None:
self._fixed_orders.append(PeriodicOrder(order=order))
def from_json(intersection_dict: Dict) -> Intersection:
"""
Loading intersection from json (expected same json structure as generated with to_json)
:param intersection_dict:
:return: intersection object
"""
# load signal groups
signalgroups = [
SignalGroup.from_json(signalgroup_dict=signalgroup_dict)
for signalgroup_dict in intersection_dict["signalgroups"]
]
if "periodic_orders" in intersection_dict:
periodic_orders = [
PeriodicOrder.from_json(order_dict=order_dict)
for order_dict in intersection_dict["periodic_orders"]
]
else:
periodic_orders = []
# load conflicts
conflicts = [
Conflict.from_json(conflict_dict=conflict_dict)
for conflict_dict in intersection_dict["conflicts"]
]
# load other relations (synchronous starts, offsets and greenyellow_lead)
sync_starts = []
offsets = []
greenyellow_leads = []
greenyellow_trails = []
for other_relation_dict in intersection_dict["other_relations"]:
assert other_relation_dict["from_start_gy"] == other_relation_dict["to_start_gy"], \
"besides conflicts, at the moment the cloud api can only handle synchronous starts, offsets, " \
"greenyellow-leads and greenyellow-trails."
if other_relation_dict[
"from_start_gy"] is True and other_relation_dict[
"to_start_gy"] is True:
if other_relation_dict["min_time"] == other_relation_dict[
"max_time"]:
if other_relation_dict["min_time"] == 0: # sync start
sync_starts.append(
SyncStart.from_json(
sync_start_dict=other_relation_dict))
else: # offset
offsets.append(
Offset.from_json(offset_dict=other_relation_dict))
else: # greenyellow-leads
greenyellow_leads.append(
GreenyellowLead.from_json(
json_dict=other_relation_dict))
elif other_relation_dict[
"from_start_gy"] is False and other_relation_dict[
"to_start_gy"] is False:
greenyellow_trails.append(
GreenyellowTrail.from_json(json_dict=other_relation_dict))
return Intersection(signalgroups=signalgroups,
conflicts=conflicts,
sync_starts=sync_starts,
offsets=offsets,
greenyellow_leads=greenyellow_leads,
greenyellow_trails=greenyellow_trails,
periodic_orders=periodic_orders)
def fix_order_and_optimize():
"""
This example shows how to ask for a fixed-time schedule that adheres to a specified fix order in which
the signalgroups should receive their greenyellow interval.
"""
logging.info(f"Running example '{os.path.basename(__file__)}'")
# signal group consisting of two traffic light allowing 1 or 2 greenyellow intervals per repeating period.
traffic_light1 = TrafficLight(capacity=1800, lost_time=2.2)
traffic_light2 = TrafficLight(capacity=1810, lost_time=2.1)
signalgroup1 = SignalGroup(id="2",
traffic_lights=[traffic_light1, traffic_light2],
min_greenyellow=10,
max_greenyellow=100,
min_red=10,
max_red=100,
min_nr=1,
max_nr=2)
# signal group consisting of one traffic light allowing 1 greenyellow interval (default) per repeating period.
traffic_light3 = TrafficLight(capacity=1650, lost_time=3.0)
signalgroup2 = SignalGroup(id="5",
traffic_lights=[traffic_light3],
min_greenyellow=10,
max_greenyellow=100,
min_red=10,
max_red=100)
# signal group consisting of one traffic light allowing 1 greenyellow interval (default) per repeating period.
traffic_light4 = TrafficLight(capacity=1800, lost_time=2.1)
signalgroup3 = SignalGroup(id="8",
traffic_lights=[traffic_light4],
min_greenyellow=10,
max_greenyellow=100,
min_red=10,
max_red=100)
# conflicts & clearance times
conflict12 = Conflict(id1=signalgroup1.id,
id2=signalgroup2.id,
setup12=1,
setup21=2)
conflict13 = Conflict(id1=signalgroup1.id,
id2=signalgroup3.id,
setup12=2,
setup21=1)
conflict23 = Conflict(id1=signalgroup2.id,
id2=signalgroup3.id,
setup12=2,
setup21=3)
# initialize intersection object
intersection = Intersection(
signalgroups=[signalgroup1, signalgroup2, signalgroup3],
conflicts=[conflict12, conflict13, conflict23])
# set associated arrival rates
arrival_rates = ArrivalRates(id_to_arrival_rates={
"2": [800, 700],
"5": [150],
"8": [180]
})
logging.info(
f"Not yet requesting any fixed order of greenyellow intervals")
logging.info(f"Minimizing average experienced delay")
# optimize fixed-time schedule
fixed_time_schedule, phase_diagram, objective_value, _ = SwiftMobilityCloudApi.get_optimized_fts(
intersection=intersection,
arrival_rates=arrival_rates,
objective=ObjectiveEnum.min_delay)
logging.info(f"Average experienced delay {objective_value: .3f} seconds")
logging.info(fixed_time_schedule)
logging.info(phase_diagram)
logging.info(f"Requesting order: 2 -> 8 -> 5 -> ")
# initialize intersection object
intersection = Intersection(
signalgroups=[signalgroup1, signalgroup2, signalgroup3],
conflicts=[conflict12, conflict13, conflict23],
periodic_orders=[PeriodicOrder(order=["2", "8", "5"])])
logging.info(f"Minimizing average experienced delay")
# optimize fixed-time schedule
fixed_time_schedule, phase_diagram, objective_value, _ = SwiftMobilityCloudApi.get_optimized_fts(
intersection=intersection,
arrival_rates=arrival_rates,
objective=ObjectiveEnum.min_delay)
logging.info(f"Average experienced delay {objective_value: .3f} seconds")
logging.info(fixed_time_schedule)
logging.info(phase_diagram)