Crashes on Washington primary roads from 2016, 2017, and 2018. Data acquired from Washington Department of Transportation through the Highway Safety Information System (HSIS).
Format
The data frame washington_roads has 1,501 rows and 9 columns:
- ID
Anonymized road ID. Factor.
- Year
Year. Integer.
- AADT
Annual Average Daily Traffic (AADT). Double.
- Length
Segment length in miles. Double.
- Total_crashes
Total crashes. Integer.
- lnaadt
Natural logarithm of AADT. Double.
- lnlength
Natural logarithm of length in miles. Double.
- speed50
Indicator of whether the speed limit is 50 mph or greater. Binary.
- ShouldWidth04
Indicator of whether the shoulder is 4 feet or wider. Binary.