b) Manual data collection of actual treatments using standard Iowa DOT post-
treatment (shift) forms
c) Automated collection of weather data (local ASOS, AWOS, and RWIS)
d) Manual collection of weather and road condition data using specialized forms
filled out by CTRE, Iowa DOT and Lab staff either riding in private cars or in
DOT maintenance vehicles along selected routes
8.2
Data Sources: Weather Observations
The following weather observation data sources were used for verification and analysis:
a)
Iowa RWIS (primarily sites in Des Moines, Ames, and Ankeny)
b)
NWS ASOS/AWOS (DSM, IKV, AMW)
c)
Local observer surface data
d)
Weather satellite
e)
Weather radar
f)
NWS storm summaries
g)
Iowa DOT observations
h)
CTRE, Iowa DOT and Lab staff observations using forms along verification
routes
i) Geonor snow gauge (Ames garage)
j) Other sources as available
8.3
Data Sources: Road Condition Observations
The following road condition data sources were used for verification and analysis:
a) Iowa RWIS road temperature (primarily sites in Des Moines, Ames, and Ankeny)
b) CTRE, Lab and Iowa DOT staff on-site data collection using forms along selected
verification routes
c) Iowa DOT operator and supervisor observations
d) Iowa DOT maintenance vehicle data
i. Pavement temperature
ii. Freezing point
iii. Truck location and time
8.4
Data Sources: Actual Treatment Performed
The following data sources were used to obtain data describing the actual winter
maintenance treatments:
a) CTRE, Lab and Iowa DOT staff on-site data collection using forms along selected
verification routes
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