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Modern Geomatics Technologies and Applications

9. Appendices

Table 1 Description of Variables.
Abbreviation Description Details

DRUNK_DR Number of drunk drivers Range 0-3
in the crash

WEATHER Atmospheric condition Clear/Cloudy (No Adverse Conditions)
Rain
Sleet (Hail)
Snow or Blowing Snow
Fog, Smog, Smoke

LGT_COND Light condition Daylight
Dark - Not Lighted
Dark but Lighted
Dawn
Dusk

JUNCTYPE Relation to junction Non-Junction (Non-Interchange)
Intersection (Non-Interchange)
Intersection Related (Non-Interchange)
Driveway, Alley Access, etc. (Non-
Interchange)
Entrance/Exit Ramp Related (Non-
Interchange)
Rail Grade Crossing (Non-Interchange)
Crossover-Related (Non-Interchange)
Driveway-Access Related

NO_LANES Number of travel lanes Range 1-7

SPEED Speed limit Range 25-70 (mph)

ALIGNMENT Roadway alignment Straight
Curve

PROFILE Roadway profile Level
Grade
Hillcrest

Sag

PAVE-TYPE Roadway surface type Concrete
Blacktop, Bituminous, or Asphalt

SUR-COND Roadway surface Dry
condition Wet
Snow or Slush
Ice/Frost
Sand, Dirt, Mud, Gravel
Water (standing or moving)

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