Performance Measure Summary - Indio-Cathedral City CA
There are several inventory and performance measures listed in the pages of this Urban Area Report for the
years from 1982 to 2014. There is no single performance measure that experts agree “says it all.” A few key
points should be recognized by users of the Urban Mobility Scorecard data.
Use the trends – The multi-year performance measures are better indicators, in most cases, than any single
year. Examining a few measures over many years reduces the chance that data variations or the estimating
procedures may have caused a "spike" in any single year. (5 years is 5 times better than 1 year.)
Use several measures – Each performance measure illustrates a different element of congestion. (The
view is more interesting from atop several measures .)
Compare to similar regions – Congestion analyses that compare areas with similar characteristics (for
example, population, growth rate, road and public transportation system design) are usually more insightful
than comparisons of different regions. (Los Angeles is not Peoria.)
Compare ranking changes and performance measure values – In some performance measures a small
change in the value may cause a significant change in rank from one year to the next. This is the case when
there are several regions with nearly the same value. (15 hours is only 1 hour more than 14 hours .)
Consider the scope of improvement options – Any improvement project in a corridor within most of the
regions will only have a modest effect on the regional congestion level. (To have an effect on areawide
congestion, there must be significant change in the system or service.)
Performance Measures and Definition of Terms
Travel Time Index – A measure of congestion that focuses on each trip and each mile of travel. It is
calculated as the ratio of travel time in the peak period to travel time in free-flow. A value of 1.30 indicates
that a 20-minute free-flow trip takes 26 minutes in the peak.
Planning Time Index – A travel time reliability measure that represents the total travel time that should be
planned for a trip. Computed with the 95th percentile travel time it represents the amount of time that should
be planned for a commute trip to be late for only 1 day a month. If it is computed with the 80th percentile
travel time it represents the amount of time that should be planned for a trip to be late for only 1 day a week.
A PTI of 2.00 means that for a 20-minute trip in light traffic, 40 minutes should be planned.
Peak Commuters – Number of travelers who begin a trip during the morning or evening peak travel periods
(6 to 10 a.m. and 3 to 7 p.m.). "Commuters" are private vehicle users unless specifically noted.
Annual Delay per Commuter – A yearly sum of all the per-trip delays for those persons who travel in the
peak period (6 to 10 a.m. and 3 to 7 p.m.). This measure illustrates the effect of traffic slowdowns as well as
the length of each trip.
Total Delay – The overall size of the congestion problem. Measured by the total travel time above that
needed to complete a trip at free-flow speeds. The ranking of total delay usually follows the population
ranking (larger regions usually have more delay).
Free-Flow Speeds – These values are derived from overnight speeds in the INRIX speed database. They
are used as the national comparison thresholds. Other speed thresholds may be appropriate for urban
project evaluations or sub-region studies.
Excess Fuel Consumed – Increased fuel consumption due to travel in congested conditions rather than freeflow conditions.
Congestion Cost – Value of travel delay for 2014 (estimated at $17.67 per hour of person travel and $94.04
per hour of truck time) and excess fuel consumption estimated using state average cost per gallon.
Urban Area – The developed area (population density more than 1,000 persons per square mile) within a
metropolitan region. The urban area boundaries change frequently (every year for most growing areas), so
increases include both new growth and development that was previously in areas designated as rural.
Number of Rush Hours – Time when the road system might have congestion.
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
2014
2013
2012
2011
2010
365
90
180
360
90
181
355
90
178
350
90
175
350
89
175
2,056
4,403
2,012
4,308
1,065
4,480
1,058
4,473
1,088
4,435
17.67
94.04
3.63
3.85
17.39
89.60
3.89
4.12
17.14
89.56
3.89
4.20
16.79
86.81
3.51
4.02
16.30
88.12
3.05
3.20
2014
2013
2012
2011
2010
2
3
0.10
----
----
----
----
660
101
2
101
662
101
2
101
662
101
2
101
662
101
2
101
656
101
2
101
1,685
101
6
101
1.05
101
1.26
36
1.32
101
1,690
101
6
101
1.05
101
1.26
34
---
1,690
101
6
101
1.05
101
1.26
35
---
1,690
101
6
101
1.05
101
1.26
35
---
1,676
101
6
101
1.05
101
1.26
34
---
40
101
149
101
41
101
152
101
42
101
154
101
43
101
158
101
43
101
161
101
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
2009
2008
2007
2006
2005
350
89
174
345
89
171
345
89
170
345
89
169
340
89
166
1,083
4,307
1,095
4,355
1,135
4,140
1,155
3,970
1,100
3,700
16.01
89.75
2.61
2.71
16.10
81.52
3.84
4.39
15.47
82.56
3.24
3.60
15.06
80.43
2.88
3.17
14.58
78.05
2.62
2.93
2009
2008
2007
2006
2005
----
----
----
----
----
664
101
2
101
644
101
2
101
882
101
3
101
964
101
4
101
851
101
3
101
1,697
101
7
101
1.05
101
1.26
34
---
1,646
101
6
101
1.05
101
1.26
38
---
2,254
101
9
101
1.07
101
1.28
32
---
2,463
101
10
101
1.07
101
1.29
31
---
2,175
101
9
101
1.07
101
1.28
33
---
45
101
166
101
43
101
160
101
62
101
228
101
69
101
256
101
63
101
234
101
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
2004
2003
2002
2001
2000
335
89
162
330
88
159
325
87
155
320
87
150
315
86
146
1,020
3,400
880
3,200
800
2,975
750
2,900
700
2,840
14.10
74.17
2.28
2.27
13.73
72.23
1.78
1.79
13.43
70.86
1.66
1.58
13.22
71.38
1.93
1.78
12.85
70.47
1.72
1.68
2004
2003
2002
2001
2000
----
----
----
----
----
675
101
3
101
605
101
2
101
457
101
2
101
458
101
2
101
447
101
2
100
1,725
101
7
101
1.05
101
1.26
35
---
1,545
101
6
101
1.05
101
1.26
35
---
1,168
101
5
101
1.04
101
1.24
38
---
1,171
101
5
101
1.04
101
1.25
35
---
1,143
101
5
101
1.04
100
1.25
34
---
52
101
192
101
48
101
176
101
37
101
136
101
37
101
139
101
38
101
139
101
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
1999
1998
1997
1996
1995
310
87
142
300
87
136
285
89
127
270
90
119
255
91
111
660
2,760
600
2,700
585
2,630
580
2,580
575
2,500
12.43
66.76
1.59
1.50
12.17
65.76
1.27
1.39
11.98
66.83
1.40
1.51
11.71
66.20
1.21
1.24
11.37
64.27
1.27
1.31
1999
1998
1997
1996
1995
----
----
----
----
----
453
101
2
99
444
101
2
99
455
100
2
99
417
100
2
97
398
100
1
100
1,157
100
5
101
1.04
100
1.25
31
---
1,134
100
5
101
1.04
100
1.25
31
---
1,161
100
6
100
1.04
100
1.25
29
---
1,066
99
6
100
1.04
99
1.25
26
---
1,018
99
6
99
1.04
99
1.25
24
---
39
100
146
101
39
100
146
101
41
100
152
100
38
100
143
100
38
99
140
99
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
1994
1993
1992
1991
1990
245
91
105
230
93
98
215
93
90
205
94
85
195
95
80
550
2,425
525
2,390
515
2,300
500
2,250
495
2,180
11.06
62.23
1.16
1.19
10.78
60.84
1.23
1.26
10.47
59.01
1.28
1.25
10.17
57.31
1.11
1.25
9.75
55.03
1.14
1.19
1994
1993
1992
1991
1990
----
----
----
----
----
406
99
2
96
407
99
2
96
390
99
1
98
393
98
1
98
379
98
1
98
1,038
99
6
98
1.05
96
1.26
21
---
1,040
99
7
98
1.05
93
1.26
19
---
996
98
7
98
1.05
92
1.26
16
---
1,004
98
7
98
1.06
89
1.27
12
---
968
98
8
95
1.06
86
1.27
12
---
40
99
147
98
41
99
151
98
40
99
149
98
42
98
155
98
42
98
155
98
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
1989
1988
1987
1986
1985
180
96
73
175
96
70
160
97
64
150
98
59
140
98
55
480
2,100
470
2,060
450
2,000
440
1,910
420
1,850
9.25
52.81
1.14
1.09
8.83
50.04
1.05
1.01
8.48
48.53
1.05
1.01
8.18
46.57
1.03
0.99
8.03
47.83
1.35
1.29
1989
1988
1987
1986
1985
----
----
----
----
----
324
98
1
97
319
98
1
94
319
98
1
93
292
98
1
91
247
98
1
90
829
98
7
97
1.05
87
1.26
14
---
815
98
7
95
1.05
84
1.26
13
---
814
97
8
92
1.06
66
1.27
11
---
747
97
8
90
1.06
57
1.27
9
---
630
97
7
92
1.05
64
1.26
8
---
38
98
140
98
39
98
144
97
41
96
150
95
39
96
143
96
33
96
123
96
The Mobility Data for Indio-Cathedral City CA
Inventory Measures
Urban Area Information
Population (1000s)
Rank
Commuters (1000s)
Daily Vehicle-Miles of Travel (1000s)
Freeway
Arterial Streets
Cost Components
Value of Time ($/hour)
Commercial Cost ($/hour)
Gasoline ($/gallon)
Diesel ($/gallon)
System Performance
Congested Travel (% of peak VMT)
Congested System (% of lane-miles)
Congested Time (number of "Rush Hours")
Annual Excess Fuel Consumed
Total Fuel (1000 gallons)
Rank
Fuel per Peak Auto Commuter (gallons)
Rank
Annual Delay
Total Delay (1000s of person-hours)
Rank
Delay per Peak Auto Commuter (pers-hrs)
Rank
Travel Time Index
Rank
Commuter Stress Index
Rank
Freeway Planning Time Index (95th Pctile)
Rank
Congestion Cost (constant 2014 $)
Total Cost ($ millions)
Rank
Cost per Peak Auto Commuter ($)
Rank
* Note: Cells containing "--" indicate no available data.
1984
1983
1982
130
98
51
115
98
45
105
98
40
410
1,775
400
1,700
390
1,600
7.75
46.47
1.36
1.31
7.43
44.23
1.39
1.34
7.20
43.08
1.46
1.40
1984
1983
1982
----
----
----
230
97
1
87
192
97
1
86
157
97
1
86
589
98
7
90
1.05
57
1.26
9
---
490
98
7
85
1.05
55
1.26
7
---
400
97
6
90
1.05
51
1.25
8
---
32
95
119
96
28
96
103
96
23
97
87
95