Innovative Approaches for Diagnosing Freeway and Arterial Performance


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Innovative Approaches for

Diagnosing Freeway and

Arterial Performance …

Brian Hoeft * RTC-FAST * May 8, 2014

… using ITS

Resources

Key Data Sets

2

1

1: non peak period (PM)

2: peak period, slightly more intense than normal recurring

8

2

1

1: significant PM (non-peak) incident

2: peak period, less intense than normal recurring

9

2

1

1: AM peak period (more severe than normal)

2: PM peak period (less severe than normal)

10

11

12

Congestion Frequency Rank

9 Very frequent greater than 3.00

8 Frequent 2.00 up to 3.00

7 Regular 1.50 up to 2.00

6 Medium

5 Some

1.00 up to 1.50

0.75 up to 1.00

4 Minimal

3 Rare

2 Very Rare

1 None

0.50 up to 0.75

0.15 up to 0.50

0.01 up to 0.15

0.00

Reliability Rank

5 Mostly unreliable

4 Often unreliable

3 Sometimes unreliable

2 Rarely unreliable

1 No unreliability greater than 50%

25 to 50%

10 to 25%

1 to 10%

0%

Notes

• A congestion event is unreliable if it causes noticeably worse than normal recurring congestion or causes congestion outside the peak period.

• Reliability is not calculated for congestion frequency rankings of Rare, Very Rare, or None

13

Congestion Frequency Score

14

Reliability Score

15

I-15 Congestion events per day: compare Fall 2013 to 2009

Fall 2013, PM 4.7

Fall 2012, PM 2.7

Fall 2011, PM 4.7

1

4

5

2

3

6 rec plus + day NPk night NPk day const night const rec plus + day NPk night NPk day const night const

Fall 2010, PM 3.2

rec plus + day NPk night NPk day const night const

Fall 2009, PM 6.2

rec plus + day NPk night NPk day const night const

18

21

22

23

The speed contour plots for the two PM peak periods highlighted above are on the next slides.

24

Apr 2, 2014: max delay is 23 mins

Delay statistics are also available for congestion duration and congestion start time

25

March 26, 2014:

Max delay is 7 mins

26

27

28

33 mile queue

12.01.13

30

Plot of last four Mondays

I-15 NB just north of trend

Arrow points to time when volumes begin to noticeably drop due to I-15 freeway closure near Victorville

Note: April 14 & April 21 volumes are relatively high

(likely due to spring break /

Easter)

Time of day (15 minute intervals)

Travel times in resort corridor

1. We archive snapshots of nine CCTV images at four second intervals.

2. Included in this document is a sample for LV Blvd between

Flamingo and Wynn.

3. A vehicle can be identified and then its time to travel the corridor is tracked.

LV Blvd between Flamingo and Wynn

LV Blvd NB between Planet Hollywood & Fashion Show

Slide 1 of 10

15.40.18

0.00

LV Blvd NB between Planet Hollywood & Fashion Show

Slide 9 of 10 (I’ve only included these two samples for this email)

15.43.27

3.09

NB Platoon

The

End

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