multiple performance measures for snow and ice control rico baroga washington state department of...
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Multiple Performance Measures for Snow and Ice Control
Rico Baroga
Washington State Department of Transportation
MAP Snow and Ice Performance Measures
• Began with expenditures and winter severity
• Moved to measured outcomes – average road condition and bare pavement regain time
• Have settled on average road condition as primary performance measure
• Level of Service scale: “A” to “F”
Customer Surveys
• Telephone survey of randomly-selected drivers regarding general satisfaction with maintenance
• More focused – Long haul truck drivers using Mountain Pass Highways
Road closure hours vs snowfallSnoqualmie Pass (I-90) Winter Closure Hours
0:00:00
120:00:00
240:00:00
360:00:00
480:00:00
600:00:00
720:00:00
Winter Season
Acc
um
ula
ted
An
nu
al H
ou
rs
0
100
200
300
400
500
600
700
Inch
es o
f S
no
wfa
ll
Overtime hours vs snowfall
Snow and Ice Control Overtime Hours per Snowfall Amounts - NC Region, Wenatchee Maintenance Area
0
500
1000
1500
2000
2500
3000
90-9
191
-92
92-9
393
-94
94-9
595
-96
96-9
797
-98
98-9
999
-00
00-0
12-
Jan
Winter Season
Inch
es o
f S
no
wfa
ll
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
Ho
urs
of
Ove
rtim
e
Percentage of anti-icer useStatewide Anti-icer Use and Winter Road Level
of Service
0%10%20%30%40%50%60%70%80%90%
100%
99-0
0
00-0
1
01-0
2
02-0
3
03-0
4
Winter Season
Per
cen
tag
e o
f A
nti
-ic
er U
se
11.522.533.544.55
Win
ter
Ro
adw
ay
Co
nd
itio
n R
atin
g
S&I costs per lane mile
Location Labor Equipment Materials Lane Miles $/Lane MileLOS
RatingSC Region Salt $57,000 $26,000 $73,727 102 $1,537 ANC Region Corrosion-inhibited Chemicals $50,838 $36,458 $221,926 222 $1,393 A+Eastern Region Salt $72,808 $70,406 $199,292 253 $1,354 A+
2003-04 Salt Pilot Project Cost Summary
Winter Severity
Fiscal Year Winter Severity and Maintenance Costs (Costs in 2001 dollars)
0
5
10
15
20
25
30
35
40
45
'92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02*
Friction Wheel Evaluation