Maisha Mahmud ITS Lab Meeting Wednesday, March 19, 2008

Maisha MahmudITS Lab Meeting

Wednesday, March 19, 2008

Using Existing ITS Commercial Vehicle Operation (ITS/CVO) Data to Develop Statewide (and Bi-state) Truck Travel Time Estimates and Other Freight Measures

Project Objective

•Study the feasibility of using transponder data from commercial vehicles to predict corridor travel times with existing infrastructure •Retrospectively study truck transponder data in key corridors to determine the feasibility of producing freight corridor performance measures.

WINTER PASS DRIVING UPDATES Thursday, Jan. 31, 11:45 a.m. DESCRIPTION: I-84, one of the primary east-west routes through northern Oregon, is closed from Pendleton, Oregon to Ontario, Oregon, which are both east of the interchange of I-82 and I-84.

Project Background

Oregon Green Light

20 active reporting WIM stations 4,013 trucking companies 40,606 trucks equipped with

transponders enrolled in the preclearance program (March 08)

These WIM stations provide: Gross Vehicle Weight Axle Weight Spacing Transponder Tags

Stations

Preliminary analysis

Why we need preliminary analysis?Large data set (20 GB)Data from 2005-currentWealth of information like GVW, Speed, axle load, axle spacing, etc, need close observation.Find how many trucks have tag, of them % valid match,% outside match.How many times a single tag repeated within a single station.Find how truck choose their possible routes within a corridor and estimate their travel time.Finally set a logic for possible matching.

Test corridor– I-84 WB Stations: Farewell Bend, Emigrant Hill, Wyeth Analysis duration: February 2007 Methodology:

First checked how many trucks have tag in each station. Clean data for without tag Make them unique by adding Tag_Day_Month. Remove duplicate tags at each station Matched the tag between adjacent stations and all three

stations. Calculated travel time.

Preliminary Analysis, Feb 2007

Highest number of observations of an individual tag at a station: 82 times in Wyeth for a month.

Duplicate tags between stations

Farewell Bend-2%

Emigrant Hill -2%

Wyeth-5%

Stations Truck with Tag Non Tag

Farewell Bend 38% 62%

Emigrant Hill 44% 56%

Wyeth 48% 52%


Farewell Bend

Emigrant HillWyeth


0

500

1000

1500

2000

2500

3000

1:50

2:34

3:19

4:04

4:48

5:33

6:18

7:03

7:47

8:32

9:17

10:0

210

:46

11:3

112

:16

13:0

013

:45

14:3

015

:15

Fre

qu

en

cy

Travel Time

Farewell Bend To Emigrant Hill Travel TimeHistogram

Mean Travel Time 2 hour 36 minMedian Travel Time 2 hour 22 minFree flow travel time 2 hourstandard deviation=5%


0

200

400

600

800

1000

1200

1400

1600

1800

2:30

3:39

4:48

5:56

7:05

8:14

9:23

10:3

111

:40

12:4

913

:58

15:0

716

:15

17:2

418

:33

19:4

220

:50

Freq

uenc

y

Travel Time

Emigrant Hill To Wyeth Travel Time Histogram

Mean Travel Time 3 hour 53 min Median Travel time 3 hour 22 minFree Flow Travel Time 2 hour 50 minStandard deviation=7%


0

100

200

300

400

500

600

700

4:35

5:39

6:44

7:49

8:53

9:58

11:0

312

:07

13:1

214

:17

15:2

116

:26

17:3

118

:35

19:4

020

:45

21:4

922

:54

Freq

uenc

y

Travel Time

Farewell Bend to Wyeth Travel Time Histogram

Mean Travel Time 6 hour 22 minMedian Travel Time 5 hour 51 minFree Flow Travel Time 5 hourStandard Deviation= 7%



?

Farewell Bend POE I-84 WB, MP 353.31

Emigrant Hill, I-84 WB, MP 226.95

Wyeth, I-84 WB, MP 54.3,

Juniper Butte, US-97 SB, MP 108.2

Klamath Falls (SB), US-97 SB, MP 271.41

Brightwood, US-26 WB, MP 36.31

Lowell, US-58 WB, MP 17.17

2h

Wilbur, I-5 SB, MP 130

Ashland, I-5 SB, MP 18.08

Woodburn, I-5 SB, MP 274.18



Woodburn, I-5 SB, MP 274.18



1h20m

2h30m

2h

1h10m

2h

1h

2h30m

2h

4h2h50

1h40m

2h30m

1h10m

Washington

2h50m

Probable Algorithm

•Check if truck have tag/transponder within a station•If truck have tag make it “tag_day_month”•Check if tag_day_month (station1) match with tag_day_month (station 2)•If count (match)=1•Get travel time= station 2 (travel time)-station1(travel time)•If count(match)>1•Exclude(count)•End.

Some Freight Measures

0

20

40

60

80

100

120

140

160

180

2004 9 14

19

25

30

35

40

45

50

55

61

66

71

76

81

86

91

96

10

2

10

7

11

2

Mo…

Fre

qu

en

cy

GVW

Matched Tag Gross Vehicle Weight Histogram

Farewell Bend

EmigrantHill

Wyeth

Gross vehicle weight variation and loading distribution between these three station with matched tag.

Questions?

Documents

Maisha Mahmud ITS Lab Meeting Wednesday, March 19, 2008