Speed Harmonization
Speed Harmonization A Small Connected-Automated Vehicle Experiment July 21, 2015 U.S. Department of Transportation 8/25/2015 FEDERAL HIGHWAY ADMINISTRATION
1
Speed Harmonization Congested Section - Beltway to DC along Interstate 66
2
Speed Harmonization Average for Recurring Congested Conditions • Eastbound • Afternoon Recurrent Congestion • Structure 70
60
Speed MPH
50
40
30
20
10
0 68
68.5
69
69.5 70 Mile Marker
70.5
71
71.5
3
Speed Harmonization Simple Model for Traffic Speed Behavior
4
Speed Harmonization
4G Wireless I2V Connection for remote speed control of equipped vehicles
Vehicle receives new speed and headway setting from server DSRC-equipped vehicle CACC activated
Turner Fairbank Highway Research Center – Saxton Lab Servers
Geo-referenced location
5
Speed Harmonization Small Connected-Automated Vehicle Experiment • Inputs from: Upstream and Downstream • Control Vehicles (Central Control) • Probe Vehicles (Sensor)
6
Speed Harmonization Small Connected-Automated Vehicle Experiment • • • • •
Partnering with VDOT to deploy on I-66 Deploying real-time traffic sensors and processing data for algorithm input Transmitting real-time advisory speeds to the automation (not the driver) Use probe vehicles as sensors Small Control Volume Around Control Vehicles
7
Speed Harmonization
Results
Experimental Measurements
Detrended Measurements
8
Speed Harmonization
Results Time Domain
Leading Probe
Following Probe Frequency Domain
9
Speed Harmonization USDOT – VADOT - VA State Police Agreed to the experiment on I-66 in Live Traffic and It Works ! 8/25/2015
10
Speed Harmonization
Short Term Research Underway – Phase 0 1) Additional experiments to verify a) Statistical Validity b) Effective Control Volume (surrogate for Penetration Rates) 2) Alternative Algorithms? (Now: Traffic Theory Density Based, Speed Based)
11
Speed Harmonization
Connected-Automated Vehicle Research Underway – Phase 1 1) Survey Article for peer Review - Intellectual basis for Guidance 2) Overall Concept Development to Guide Experiments 3) Alternative Site(s) Identification 4) Alternative Algorithms 5) Alternative Scenarios 6) State Agency Guidance 12
1
Speed Harmonization Congested Section - Beltway to DC along Interstate 66
2
Speed Harmonization Average for Recurring Congested Conditions • Eastbound • Afternoon Recurrent Congestion • Structure 70
60
Speed MPH
50
40
30
20
10
0 68
68.5
69
69.5 70 Mile Marker
70.5
71
71.5
3
Speed Harmonization Simple Model for Traffic Speed Behavior
4
Speed Harmonization
4G Wireless I2V Connection for remote speed control of equipped vehicles
Vehicle receives new speed and headway setting from server DSRC-equipped vehicle CACC activated
Turner Fairbank Highway Research Center – Saxton Lab Servers
Geo-referenced location
5
Speed Harmonization Small Connected-Automated Vehicle Experiment • Inputs from: Upstream and Downstream • Control Vehicles (Central Control) • Probe Vehicles (Sensor)
6
Speed Harmonization Small Connected-Automated Vehicle Experiment • • • • •
Partnering with VDOT to deploy on I-66 Deploying real-time traffic sensors and processing data for algorithm input Transmitting real-time advisory speeds to the automation (not the driver) Use probe vehicles as sensors Small Control Volume Around Control Vehicles
7
Speed Harmonization
Results
Experimental Measurements
Detrended Measurements
8
Speed Harmonization
Results Time Domain
Leading Probe
Following Probe Frequency Domain
9
Speed Harmonization USDOT – VADOT - VA State Police Agreed to the experiment on I-66 in Live Traffic and It Works ! 8/25/2015
10
Speed Harmonization
Short Term Research Underway – Phase 0 1) Additional experiments to verify a) Statistical Validity b) Effective Control Volume (surrogate for Penetration Rates) 2) Alternative Algorithms? (Now: Traffic Theory Density Based, Speed Based)
11
Speed Harmonization
Connected-Automated Vehicle Research Underway – Phase 1 1) Survey Article for peer Review - Intellectual basis for Guidance 2) Overall Concept Development to Guide Experiments 3) Alternative Site(s) Identification 4) Alternative Algorithms 5) Alternative Scenarios 6) State Agency Guidance 12
