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102 lines
3.6 KiB
Python
Executable File
102 lines
3.6 KiB
Python
Executable File
#!/usr/bin/python3
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# This example runs a scenario, finds roads with high driver throughput, then
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# establishes a per-hour cap.
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#
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# Before running this script, start the API server:
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#
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# > cargo run --release --bin headless -- --port=1234 --alerts=silence
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#
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# You may need to install https://requests.readthedocs.io
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# Keep this script formatted with autopep8 -i
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import abst_helpers
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from abst_helpers import get
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from abst_helpers import post
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import argparse
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import sys
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import time
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('--api', default='http://localhost:1234')
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parser.add_argument('--city_name', default='seattle')
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parser.add_argument('--map_name', default='montlake')
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parser.add_argument('--hours', type=int, default=24)
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parser.add_argument('--cap_pct', type=int, default=80)
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parser.add_argument('--rounds', type=int, default=10)
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parser.add_argument('--cap_all_roads', type=bool, default=True)
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args = parser.parse_args()
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print('Simulating {} hours of data/system/{}/scenarios/{}/weekday.bin'.format(
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args.hours, args.city_name, args.map_name))
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baseline = abst_helpers.run_sim(args)
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edits = get(args, '/map/get-edits').json()
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for _ in range(args.rounds):
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print('')
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print('{} roads have a cap'.format(len(edits['commands'])))
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experiment = abst_helpers.run_sim(args, edits=edits)
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baseline.compare(experiment)
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print('{:,} trips changed due to the caps'.format(
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len(experiment.capped_trips)))
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if args.cap_all_roads:
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edits['commands'] = cap_all_roads(args)
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# Individual cap per road; don't merge adjacent roads that happen to have the same cap.
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edits['merge_zones'] = False
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else:
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# Cap the busiest road
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busiest_road, thruput = find_busiest_road(args)
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cmd = get(args, '/map/get-edit-road-command',
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params={'id': busiest_road}).json()
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cmd['ChangeRoad']['new']['access_restrictions']['cap_vehicles_per_hour'] = int(
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(args.cap_pct / 100.0) * thruput)
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edits['commands'].append(cmd)
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# Write the final edits
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f = open('cap_edits.json', 'w')
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f.write(get(args, '/map/get-edits').text)
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f.close()
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# Find the road with the most car traffic in any one hour period
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def find_busiest_road(args):
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thruput = get(
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args, '/data/get-road-thruput').json()['counts']
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max_key = None
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max_value = 0
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for r, agent, hr, count in thruput:
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if agent == 'Car':
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if count > max_value:
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max_key = (r, hr)
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max_value = count
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print('Busiest road is #{}, with {} cars crossing during hour {}'.format(
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max_key[0], max_value, max_key[1]))
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return (max_key[0], max_value)
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# Cap all roads to some percent of their max throughput over any one hour period
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def cap_all_roads(args):
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thruput = get(
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args, '/data/get-road-thruput').json()['counts']
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max_per_road = {}
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for r, agent, hr, count in thruput:
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if agent == 'Car':
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if r not in max_per_road or count > max_per_road[r]:
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max_per_road[r] = count
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commands = []
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for r, count in max_per_road.items():
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cap = int((args.cap_pct / 100.0) * count)
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# Don't go too low
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if cap > 10:
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cmd = get(args, '/map/get-edit-road-command',
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params={'id': r}).json()
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cmd['ChangeRoad']['new']['access_restrictions']['cap_vehicles_per_hour'] = cap
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commands.append(cmd)
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return commands
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if __name__ == '__main__':
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main()
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