5/1/2007 ITS Lab
24
Comparison before and after SWARM activation on OR-217 Comparison before and after SWARM activation on OR-217 in November 2005, and with results from June 2006 in November 2005, and with results from June 2006 pilot study of SWARM on OR-217. pilot study of SWARM on OR-217. Using Archived Data to Measure Using Archived Data to Measure Operational Benefits of a System- Operational Benefits of a System- wide Adaptive Ramp Metering (SWARM) wide Adaptive Ramp Metering (SWARM) System System Analysis of Archived 2005 Data for Analysis of Archived 2005 Data for OR-217 SB OR-217 SB 5/1/2007 5/1/2007 ITS Lab ITS Lab
description
Using Archived Data to Measure Operational Benefits of a System-wide Adaptive Ramp Metering (SWARM) System Analysis of Archived 2005 Data for OR-217 SB. Comparison before and after SWARM activation on OR-217 in November 2005, and with results from June 2006 pilot study of SWARM on OR-217. - PowerPoint PPT Presentation
Transcript of 5/1/2007 ITS Lab
Comparison before and after SWARM activation on OR-217 in Comparison before and after SWARM activation on OR-217 in November 2005, and with results from June 2006 pilot study of November 2005, and with results from June 2006 pilot study of SWARM on OR-217.SWARM on OR-217.
Using Archived Data to Measure Using Archived Data to Measure Operational Benefits of a System-wide Operational Benefits of a System-wide
Adaptive Ramp Metering (SWARM) Adaptive Ramp Metering (SWARM) SystemSystem
Analysis of Archived 2005 Data for OR-217 Analysis of Archived 2005 Data for OR-217 SBSB
5/1/20075/1/2007
ITS LabITS Lab
ObjectivesObjectives Validate OR-217S SWARM pilot study results using Validate OR-217S SWARM pilot study results using
2005 archival data before and after SWARM 2005 archival data before and after SWARM implementation.implementation. Process 2005 archival data for OR-217SProcess 2005 archival data for OR-217S Loop detector, incident and weather data from PORTAL ArchiveLoop detector, incident and weather data from PORTAL Archive Reprocess 2006 pilot data to ensure comparable results.Reprocess 2006 pilot data to ensure comparable results.
Incorporate TAC suggestions for data presentationIncorporate TAC suggestions for data presentation Ramps and mainlineRamps and mainline
Ramp volume vs. mainline speed/flowRamp volume vs. mainline speed/flow VHT: Stacked bar comparing mainline and rampVHT: Stacked bar comparing mainline and ramp Travel TimeTravel Time Break out performance measures by mainline and rampBreak out performance measures by mainline and ramp
Other Other Data QualityData Quality
Study PeriodsStudy Periods
Pilot Study in June, 2006Pilot Study in June, 2006 1 week each pre-timed and SWARM1 week each pre-timed and SWARM Pre-Timed: 6/19 – 6/23/06Pre-Timed: 6/19 – 6/23/06
Wed 6/21 excludedWed 6/21 excluded SWARM: 6/26 – 6/30/06SWARM: 6/26 – 6/30/06
Fri 6/30 excludedFri 6/30 excluded
Study of 2005 archive dataStudy of 2005 archive data Before and after SWARM activation on 11/3/2005Before and after SWARM activation on 11/3/2005 Pre-SWARM: 10/10 – 10/21/05 (2 weeks)Pre-SWARM: 10/10 – 10/21/05 (2 weeks)
10/24 – 10/28 (e.g. comm loss ~ 10% on 10/24 & 10/28 @ 7210/24 – 10/28 (e.g. comm loss ~ 10% on 10/24 & 10/28 @ 72ndnd)) Post-SWARM: 11/7 – 11/17/05 (2 weeks)Post-SWARM: 11/7 – 11/17/05 (2 weeks)
11/7 – 1 hour comm loss – 10% missing timestamps11/7 – 1 hour comm loss – 10% missing timestamps Used 11/14 dataUsed 11/14 data
11/21 – 11/25: Thanksgiving11/21 – 11/25: Thanksgiving
LimitationsLimitations
Potential sources of variationPotential sources of variation IncidentsIncidents
Depends on accuracy of Portal archived incident dataDepends on accuracy of Portal archived incident data ClimateClimate Seasonal driving patterns (e.g. school)Seasonal driving patterns (e.g. school)
Missing data points interpolated within each day.Missing data points interpolated within each day. Greater communications failures than in pilot studyGreater communications failures than in pilot study Time period selected to avoid most significant issuesTime period selected to avoid most significant issues
Multi-week study period provides additional dataMulti-week study period provides additional data Can replace one “bad” day with a comparable dayCan replace one “bad” day with a comparable day
Communications Failures - Communications Failures - 20052005
Communications Failures and Missing Timestamps by RampPre-SWARM 10/ 10 to 10/ 21/ 05 and Post-SWARM 11/ 7 to 11/ 18/ 05
0.0%
2.0%
4.0%
6.0%
8.0%
10.0%
12.0%
14.0%
16.0%
Barnes
Wils
hire
Walk
er
Bhhw
yAllen
Denne
yHall
Scho
lls
Green
burg
99W
72nd
On-ramps on ORE 217 southbound
% C
om
munic
ation F
ailure
s
PreSWARM
PostSWARM
Communications Failures and Missing TimestampsPre-SWARM 10/10 to 10/21/05 and Post-SWARM 11/7 to 11/18/05
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
10-10 10-11 10-12 10-13 10-14 10-17 10-18 10-19 10-20 10-21 11-7 11-8 11-9 11-10 11-11 11-14 11-15 11-16 11-17 11-18
Dates
% C
om
mu
nic
atio
n F
ailu
res
Q1
Min
Median
Max
Q3
Pre-SWARM Post-SWARM72nd
Walker
Walker
Bottom chart Bottom chart shows problems shows problems at isolated ramps at isolated ramps on three days on three days pre-SWARM.pre-SWARM.
Higher Higher percentage of percentage of failures in failures in general and general and system-wide on system-wide on three particular three particular days post-days post-SWARM. SWARM.
Communications Failures - Communications Failures - 20062006
Communications Failures and Missing Timestamps by DatePre-Timed 6/19 to 6/23/06 and SWARM 6/26 to 6/30/06
0.0%
2.0%
4.0%
6.0%
8.0%
10.0%
12.0%
14.0%
16.0%
18.0%
20.0%
6-19 6-20 6-21 6-22 6-23 6-26 6-27 6-28 6-29 6-30
Dates
% C
om
mu
nic
atio
n F
ailu
res
Q1
Min
Median
Max
Q3
Pre-Timed SWARM
Greenburg
Note: 72nd Excluded (Avg 65.1% Pre-Timed, 69.2% SWARM)
Walker, BH Hwy
7272ndnd Ave Ave excluded from excluded from bottom chartbottom chart
Capacity Capacity issues should issues should now be now be addressedaddressed Data network Data network
upgrade in late upgrade in late 2006.2006.
Communications Failures and Missing Timestamps by RampPre-Timed 6/ 19 to 6/ 23/ 06 and SWARM 6/ 26 to 6/ 30/ 06
0.0%
2.0%
4.0%
6.0%
8.0%
10.0%
12.0%
14.0%
16.0%
On-ramps on ORE 217 southbound
% C
om
munic
ation F
ailure
s
Pre-Timed Avg
SWARM Avg
72nd: 65.1% Pre-Timed, 69.2% SWARM
Incidents - 2005Incidents - 2005 Highlighted incidents fall within weeks selected for study. Criteria?
Number of lanes affected, duration (>30 minutes) 10/11 @ Canyon
Incident ID Date Start Time End Time Duration Location#
Lanes Comment
482303 2005-09-16 08:18:37 09:03:32 00:44:55 HWY 26 1 Comm Loss
483300 2005-09-19 07:54:48 07:55:36 00:00:48 Just North Of 72ND 0
489082 2005-10-01 08:53:06 09:14:33 00:21:27 HWY 26 0 Weekend
489682 2005-10-03 08:23:44 08:37:10 00:13:26 Near ALLEN 0
491300 2005-10-06 07:49:42 08:02:00 00:12:18 Just South Of DENNEY 1
491360 2005-10-06 08:50:00 08:56:55 00:06:55 At SCHOLLS 0
493205 2005-10-11 08:38:06 09:09:01 00:30:55 At CANYON 1
496800 2005-10-20 07:21:10 07:27:31 00:06:21 SCHOLLS 1
499962 2005-10-28 09:20:03 09:22:36 00:02:33 ALLEN 1 Comm Loss
499964 2005-10-28 09:32:38 09:33:16 00:00:38 SCHOLLS 1 Comm Loss
502920 2005-11-03 07:11:44 07:51:35 00:39:51 ALLEN 1
503004 2005-11-03 09:17:10 09:17:20 00:00:10 CANYON 1
506322 2005-11-10 06:46:41 06:48:38 00:01:57 At ALLEN 1
511003 2005-11-22 08:30:44 09:00:08 00:29:24 At CANYON RD 1 Thanksgiving
511481 2005-11-23 09:54:54 10:18:24 00:23:30 Just North Of CANYON RD 1 Thanksgiving
513260 2005-11-29 05:39:54 07:04:26 01:24:32 Just South Of GREENBURG ROAD 2
513863 2005-11-30 07:56:27 08:39:13 00:42:46 At HWY 99W 0
515762 2005-12-05 06:52:35 07:27:29 00:34:54 Just South Of 72ND 1
WeatherWeatherOct 2005 Pre-SWARM Nov 2005 Post-SWARM
Incidents, Weather, Incidents, Weather, CommunicationsCommunications
October 10
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
11
Incident 0:30 @ Canyon (1 Ln)
12 13
Rain 5-7,8-9am (.04")
14 15 16
17 18 19
Rain 7-8am (.01")
20
Incident 0:06 @ Scholl’s (1 Ln)Rain 6-9am (.07")
21 22 23
24
Comm Loss
25 26 27 28
Comm Loss
29 30
31 November 1 2 3
SWARM Activated
4 5 6
7
Rain 5-7am (.03")High Comm Loss, Replaced with 11/14
8
Rain 9-10am (.01")
9 10
Incident 0:02@ Allen (1 Lane)
11
Rain 7-8am (.01")
12 13
14 15 16 17
High Comm Loss – Replaced with 11/10
18
High Comm Loss – Replaced with 11/11
19 20
10/10/2005 - 11/17/2005
Pre
-Tim
ed S
tud
yS
WA
RM
Stu
dy
AdjustmentsAdjustments
Adjusted for incidents, communication loss Adjusted for incidents, communication loss where most significant. where most significant. Pre-TimedPre-Timed
Did not adjust:Did not adjust: 10/11 Walker (Incident)10/11 Walker (Incident) 10/12 7210/12 72ndnd (Comm Loss) (Comm Loss) 10/20-21 Walker (Comm Loss)10/20-21 Walker (Comm Loss)
SWARMSWARM Replaced data for all ramps:Replaced data for all ramps:
Mon 11/7 with Mon 11/14Mon 11/7 with Mon 11/14 Thu 11/17 with Thu 11/10Thu 11/17 with Thu 11/10 Fri 11/18 with Fri 11/11Fri 11/18 with Fri 11/11
Did not adjust ramp inflow calculations, chartsDid not adjust ramp inflow calculations, charts Also interpolated for missing data pointsAlso interpolated for missing data points
Performance Measures (6-9/10 Performance Measures (6-9/10 AM)AM) 2006 original analysis was 6-9 am.
2006 data reprocessed to ensure comparable time range and methods. 2005 data
Pre-Timed VHT, DelayPre-Timed VHT, Delay
VMTVHT
(Avg Daily)Travel-Time
Avg Delay (veh-hours)
Rainy Days Incident
Days Excluded
Pre-Timed 65,871 1,337 8.8 210 0 Wed 6/23SWARM 66,426 1,416 9.2 283 Fri 6/30
% Change 0.80% 6.00% 5.10% 34.70%
Pre-Timed 83924 1649 222 0 Wed 6/23SWARM 84961 1764 315 Fri 6/30
% Change 1.24% 6.92% 42.28%
Pre-Timed 73284 2116 711 3 Pre None
SWARM 77543 1688 368 2 Post
% Change 5.81% -20.26% -48.18%
June 2006 Pilot (6-9 am)(Original Analysis)
Pre/Post Activation (6-10 am)2 Weeks Oct-Nov 2005
June 2006 Pilot (6-10 am)(Reprocessed)
Exclusions of incidents could account for shift in numbers Wednesdays typically bigger travel days than Fridays Numbers for 2006 data without exclusion of Wed 6/23 and Fri 6/30Pre-Timed 85144 1838 423 0 None
SWARM 85453 1732 294
% Change 0.36% -5.78% -30.47%
June 2006 Pilot (6-10 am)Including Incident Days(Reprocessed)
VMTVMT
Total VMT per Day 6-10 am1 Week Pre-Timed between 6/19/06 to 6/23/061 Week SWARM between 6/26/06 to 6/30/06
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
Mon Tue Wed Thu Fri Average
VM
T
Pre-Timed
SWARM
2005 Pre/Post SWARM June 2006 Pilot
VMT increased by 5.6% from the two weeks studied before VMT increased by 5.6% from the two weeks studied before SWARM activation and after.SWARM activation and after. 3.6% between four week periods before and after activation3.6% between four week periods before and after activation Possible over-estimation due to communication errors and Possible over-estimation due to communication errors and
interpolation.interpolation.
Average Total VMT 6-10 am2 Weeks Pre-SWARM between 10/10 to 10/21/052 Weeks Post-SWARM between 11/7 to 11/18/05
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
Mon Tue Wed Thu Fri Average
VM
T
PreSWARM
PostSWARM
VHTVHT
6/06 Pre-timed and SWARM
Higher VHT in 2005 period, especially Tue – ThuHigher VHT in 2005 period, especially Tue – Thu In 2005, VHT lower pre-SWARM than post-SWARMIn 2005, VHT lower pre-SWARM than post-SWARM
Versus 2006 pilot study where VHT was lower pre-timed than SWARMVersus 2006 pilot study where VHT was lower pre-timed than SWARM
2005 Pre/Post SWARMTotal VHT per Day 6-10 am
1 Week Pre-Timed between 6/19/06 to 6/23/061 Week SWARM between 6/26/06 to 6/30/06
0
500
1000
1500
2000
2500
Mon Tue Wed Thu Fri Average
VH
T
Pre-Timed
SWARM
Average Total VHT by Day, 6-10 am2 Weeks Pre-SWARM between 10/10 to 10/21/052 Weeks Post-SWARM between 11/7 to 11/18/05
0
500
1000
1500
2000
2500
Mon Tue Wed Thu Fri Average
VH
T
PreSWARM Totals
PostSWARM Totals
OscillationsOscillations
6/06 Pre-timed and SWARM2005 Pre/Post SWARMOscillations 6-10 am
1 Week Pre-Timed between 6/19/06 to 6/23/061 Week SWARM between 6/26/06 to 6/30/06
4
6
8
10
12
14
16
18
0 1 2 3 4 5 6 7
Milepost on ORE 217 Southbound
RM
SE
(ve
hic
les)
Pre-timed
SWARM
Oscillations 6-10 am2 Weeks Pre-SWARM between 10/10 to 10/21/05
2 Weeks Post-SWARM between 11/7/05 to 11/18/05
4
6
8
10
12
14
16
18
0 1 2 3 4 5 6 7 8
Milepost on ORE 217 Southbound
RM
SE
(ve
hic
les)
PreSWARM Avg
SWARM Avg
Ramp Flow Ramp Flow – by on-ramp– by on-ramp
On-ramp Flow 6:30 - 8:30 am1 Week Pre-Timed betw een 6/19/06 to 6/23/061 Week SWARM betw een 6/26/06 to 6/30/06
0100200300400500600700800900
1000
Barnes Wilshire Walker B-H Hw y Allen Denney Hall Scholls-Ferry
On-ramp
On
-ram
p f
low
(vp
h)
Pre-timed
SWARM
June 2006 Pilot
2005 Pre/Post SWARM
Flow at each ramp Flow at each ramp roughly comparable roughly comparable between 2005 and between 2005 and 2006. 2006. 2005: slight decrease 2005: slight decrease
under SWARM under SWARM 2006: slight increase 2006: slight increase
under SWARMunder SWARM Note: 2006 chart does Note: 2006 chart does
not include not include Greenburg, 99W, and Greenburg, 99W, and 7272ndnd
On-ramp Flow 6:30 - 8:30 am2 Weeks Pre-SWARM betw een 10/10 to 10/21/052 Weeks Post-SWARM betw een 11/7 to 11/18/05
0100200300400500
600700800900
1000
On-ramp
On
-ram
p f
low
(vp
h)
Pre-timed
SWARM
Ramp Volume - ObliqueRamp Volume - Oblique
Oblique N(x,t) of On-ramp Inflows 6:30 - 8:30 am1 Week Pre-Timed between 6/19/06 to 6/23/06
1 Week SWARM between 6/26/06 to 6/30/06
200
400
600
800
1000
1200
1400
1600
1800
2000
6:30 6:40 6:50 7:00 7:10 7:20 7:30 7:40 7:50 8:00 8:10 8:20 8:30
Time
N -
q0*(
t-t 0
), q
0=
3600
vp
h
Pre-timed
SWARM
June 2006 Pilot2005 Pre/Post SWARM
Higher on-ramp inflows during 2005 pre-SWARM period than 2005 post-SWARM or Higher on-ramp inflows during 2005 pre-SWARM period than 2005 post-SWARM or 2006 pilot2006 pilot Change in behavior? Change in behavior? Do specific ramps account for the increase?Do specific ramps account for the increase? Implies that in 2005, SWARM was more restrictive than pre-timed from 7:30 to 8:30 amImplies that in 2005, SWARM was more restrictive than pre-timed from 7:30 to 8:30 am
Under SWARM ramp inflows roughly comparable between 2005 and 2006Under SWARM ramp inflows roughly comparable between 2005 and 2006 Slightly higher during June 2006 pilot Slightly higher during June 2006 pilot
Note: Greenburg, 72Note: Greenburg, 72ndnd, and 99W are not included in 2005 chart, , and 99W are not included in 2005 chart, since they were not included in the 2006 pilot study.since they were not included in the 2006 pilot study.
Oblique N(x,t) of On Ramp Vehicle Inflows2 Weeks Pre-SWARM betw een 10/10 to 10/21/052 Weeks Post-SWARM betw een 11/7 to 11/18/05
200
400
600
800
1000
1200
1400
1600
1800
2000
6:30 6:40 6:50 7:00 7:10 7:20 7:30 7:40 7:50 8:00 8:10 8:20 8:30
Time
N -
q0*
(t-t
0),
q0=
3600
vp
h
Pre-timed
SWARM
Reduced metering window under SWARMReduced metering window under SWARM Work in progress – show mainlineWork in progress – show mainline
Ramp Inflows 6/19 - 6/23 Pre-Timed
0
5
10
15
20
25
Time
Vo
lum
e
6/19/06
6/20/06
6/21/06
6/22/06
6/23/06
Ramp Inflows 6/26 - 6/30 SWARM
0
5
10
15
20
25
Time
Vo
lum
e
6/26/06
6/27/06
6/28/06
6/29/06
6/30/06
Ramp Inflows 6/19 - 6/23 Pre-TimedScholl's
0
2
4
6
8
10
12
14
16
18
20
Time
Vo
lum
e
6/19/06
6/20/06
6/21/06
6/22/06
6/23/06
Ramp Inflows 6/26 - 6/30 SWARMScholl's
0
2
4
6
8
10
12
14
16
18
20
Time
Vo
lum
e
6/26/06
6/27/06
6/28/06
6/29/06
6/30/06
Metering Activation by Ramp, Metering Activation by Ramp, 20062006
June 2006 Pilot: BH Hwy June 2006 Pilot: Scholl’s Ferry
Delay – by rampDelay – by ramp
6/06 Pre-timed and SWARM
High pre-SWARM delay for many ramps in 2005High pre-SWARM delay for many ramps in 2005 Particularly BH Hwy, Scholl’s, and GreenburgParticularly BH Hwy, Scholl’s, and Greenburg Based on 2005 data, SWARM reduced delay at many rampsBased on 2005 data, SWARM reduced delay at many ramps
But contradicts 2006 pilot studyBut contradicts 2006 pilot study
2005 Pre/Post SWARMAverage AM Peak Delay by Ramp (6-10 am)
1 Week Pre-Timed between 6/19 to 6/23/061 Week SWARM between 6/26 to 6/30/06
0
20
40
60
80
100
120
140
160
180
200
Del
ay (
Veh
icle
-Ho
urs
)
PreSWARM Avg
SWARM Avg
Average Daily Delay by Ramp (6-10 am) 2 Weeks Pre-SWARM between 10/10/05 to 10/21/052 Weeks Post-SWARM between 11/7/05 to 11/18/05
0
20
40
60
80
100
120
140
160
180
200
Barnes
Wils
hire
Walke
r
Bhhwy
Allen
Denney Hall
Scholls
Green
burg
99W
72nd
Del
ay (
Veh
icle
-Ho
urs
)
PreSWARM Avg
SWARM Avg
Delay – by day of weekDelay – by day of week
2005 Pre/Post SWARM
High pre-SWARM delay for many ramps in 2005High pre-SWARM delay for many ramps in 2005 Tue, Wed, Thu > Mon > FriTue, Wed, Thu > Mon > Fri
6/06 Pre-timed and SWARM
Average AM Peak Delay by Day of Week (6-10 am)1 Week Pre-Timed between 6/19 to 6/23/061 Week SWARM between 6/26 to 6/30/06
0
100
200
300
400
500
600
700
800
900
1000
Mon Tue Wed Thu Fri Average
Del
ay (
Veh
icle
-Ho
urs
)
Pre-Timed Daily Total
SWARM Daily Total
Average AM Peak Delay by Day of Week (6-10 am)2 Weeks Pre-SWARM between 10/10/05 to 10/21/052 Weeks Post-SWARM between 11/7/05 to 11/18/05
0
100
200
300
400
500
600
700
800
900
1000
Mon Tue Wed Thu Fri Average
Del
ay (
Veh
icle
-Ho
urs
)
PreSWARM Totals
PostSWARM Totals
Delay – 2005Delay – 2005By Ramp and Day of WeekBy Ramp and Day of Week
Combined presentation of previous two slidesCombined presentation of previous two slides Focus on BH Hwy, Scholl’s, and GreenburgFocus on BH Hwy, Scholl’s, and Greenburg
Pre-SWARM Average AM Peak Delay by Ramp and Day of Week (6-10 am)
2 Weeks Pre-SWARM between 10/10 to 10/21/05
0
200
400
600
800
1000
1200
1400
Mon Tue Wed Thu Fri
Del
ay (
Veh
icle
-Ho
urs
)
72nd
99W
Greenburg
Scholls
Hall
Denney
Allen
Bhhwy
Walker
Wilshire
Barnes
Post-SWARM Average AM Peak Delay by Ramp and Day of Week (6-10 am)
2 Weeks Post-SWARM between 11/7 to 11/18/05
0
200
400
600
800
1000
1200
1400
Mon Tue Wed Thu Fri
Del
ay (
Veh
icle
-Ho
urs
)
72nd
99W
Greenburg
Scholls
Hall
Denney
Allen
Bhhwy
Walker
Wilshire
Barnes
On-Ramp Travel TimesOn-Ramp Travel Times Not in scope of analysis of 2005 dataNot in scope of analysis of 2005 data Travel times for BH Hwy and Scholls Ferry on-ramps Travel times for BH Hwy and Scholls Ferry on-ramps
SWARM, June 2006, 23% lower at BH Hwy and 37% lower at Scholl’s SWARM, June 2006, 23% lower at BH Hwy and 37% lower at Scholl’s FerryFerry
5 minute samples from video, 6-19-06 to 6-29-065 minute samples from video, 6-19-06 to 6-29-06
0
10
20
30
40
50
60
70
80
90
6:30 6:40 6:50 7:00 7:10 7:20 7:30 7:40 7:50 8:00 8:10 8:20 8:30
Time
Tra
vel
Tim
e (s
ec)
Pre-timed
SWARM
0
20
40
60
80
100
120
140
6:30 6:40 6:50 7:00 7:10 7:20 7:30 7:40 7:50 8:00 8:10 8:20 8:30
Time
Tra
vel
Tim
e (s
ec)
Pre-timed
SWARM
FIGURE 9(a) Travel time on the Beaverton-Hillsdale Highway on-ramp. FIGURE 9(b) Travel time on the Scholls-Ferry Rd. on-ramp.
Pre-Timed SWARMmin 0:00:20 0:00:09median 0:01:10 0:00:49max 0:01:41 0:03:59
Pre-Timed SWARMmin 0:00:23 0:00:15median 0:00:31 0:00:21max 0:01:21 0:45:22
June 2006 Pilot: BH Hwy June 2006 Pilot: Scholl’s Ferry
Summary of FindingsSummary of Findings
Increase in pre-timed VHT, Delay in Increase in pre-timed VHT, Delay in 2005 vs. 2006 pilot study2005 vs. 2006 pilot study ??????
Additional weeks allowed bad data to Additional weeks allowed bad data to be replacedbe replaced Some effect but not a major changeSome effect but not a major change
Work in ProgressWork in Progress
TAC Suggestions – Plan to incorporate TAC Suggestions – Plan to incorporate as many as possible by next meetingas many as possible by next meeting On ramp volume vs. mainline speed and On ramp volume vs. mainline speed and
flowflow Comparison of travel time change on Comparison of travel time change on
mainline and rampmainline and ramp Comparison of VHT on ramp and mainlineComparison of VHT on ramp and mainline Delay by timeDelay by time Break up performance measures by ramp Break up performance measures by ramp
and mainlineand mainline
Mainline Speed and Ramp Mainline Speed and Ramp Volume Volume
Ramp Inflows and Mainline Speed at Scholl'sJune '06: 6/19-23 Pre-Timed and 6/26-30 SWARM
0
2
4
6
8
10
12
14
16
18
6:00
6:15
6:30
6:45
7:00
7:15
7:30
7:45
8:00
8:15
8:30
8:45
9:00
9:15
9:30
9:45
10:00
Time
Vo
lum
e
0
10
20
30
40
50
60
70
80
Sp
eed
Fwy Inflows Pre-Timed
Fwy Inflows SWARM
Speed Pre-Timed
Speed SWARM
Ramp Inflows and Mainline Speed at BH HwyJune '06: 6/19-23 Pre-Timed and 6/26-30 SWARM
0
2
4
6
8
10
12
14
16
18
6:00
6:15
6:30
6:45
7:00
7:15
7:30
7:45
8:00
8:15
8:30
8:45
9:00
9:15
9:30
9:45
Time
Vo
lum
e
0
10
20
30
40
50
60
70
Sp
eed
Fwy Inflows Pre-Timed
Fwy Inflows SWARM
Speed Pre-Timed
Speed SWARM
