Impairment (Drug/Alcohol)-related crashes were selected by identifying rural crashes involving any driver with a positive drug test, a non-zero Blood Alcohol Content (BAC) result, a driver condition indicating officer judgement that the driver was under the influence of alcohol, drugs, or medications, or a test refusal (whether drug or alcohol). Maps and reports are subsequent to this selection.

Inattentive/distracted crashes were selected by identifying rural crashes involving a driver contributing circumstance indicating inattentive or distracted behavior (i.e., Inattentive/distracted by: Passenger, Use of phone or other device, fallen object, of fatigued/asleep). Maps and reports are subsequent to this selection.

Older Driver-related crashes were selected by identifying rural crashes involving a driver at or over age 65. Selection of these crashes only indicates involvement and not causal factors. Maps and reports are subsequent to this selection.

Speed-related crashes were selected by identifying rural crashes involving a driver contributing circumstance indicating speed-related behavior (i.e., exceeded authorized speed; driving too fast for conditions; lost control; followed too close; or operating vehicle in an erratic, reckless, careless, negligent, or aggressive manner). Maps and reports are subsequent to this selection.

Younger Driver-related crashes were selected by identifying rural crashes involving a driver between the ages of 14 and 20 (inclusive). Selection of these crashes only indicates involvement and not causal factors on the part of the younger driver. Maps and reports are subsequent to this selection.

Animal-vehicle crashes were selected by identifying rural crashes and then by querying animal from Major Cause, where Major Cause is a derived field in which animal is determined as the Major Cause if a collision with an animal is indicated in any of the Sequence of Events (up to 4 per vehicle) entries. Maps and reports are subsequent to this selection.

Icy, Snowy, or Slushy Surface Condition-related crashes were selected by identifying rural crashes involving an icy, snowy, or slushy surface condition. Maps and reports are subsequent to this selection.

General county crash statistics include information about all rural crashes in the county regardless of topic (i.e., they are non-topical). Some splits by Rural and Urban are provided. Maps and reports are subsequent to this selection.

Unbelted Passenger-related crashes were selected by identifying rural crashes and further limiting crashes to those involving an unbelted occupant of a vehicle and injuries to those persons who were unbelted. Maps and reports are subsequent to this selection.

Intersection-related crashes were selected by identifying rural crashes and querying for the intersection options under the Type of Roadway Junction/Feature portion of the crash report form. Maps and reports are subsequent to this selection.

Heavy truck-related crashes were selected by identifying rural crashes and limiting those crashes to those involving heavy trucks (truck/trailer, truck tractor (bobtail), tractor/semi-trailer, tractor/doubles, tractor/triples). Selection of these crashes only indicates involvement and not causal factors on the part of the trucker. Maps and reports are subsequent to this selection.

Motorcycle-related crashes were selected by identifying rural crashes and limiting those crashes to those involving motorcycles. Selection of these crashes only indicates involvement and not causal factors on the part of the motorcyclist. Maps and reports are subsequent to this selection.

Multi-Vehicle Crossed Centerline/Crossed Median (MVCC/CM) crashes were selected by identifying rural crashes and then by limiting to multi-vehicle crashes and then further querying Manner of Crash/Collision Impact equal to head-on; sideswipe, same direction; or sideswipe, opposite direction or any Sequence of Event (up to 4 per vehicle) equal to crossed centerline/median or any Contributing Circumstance, Driver (up to 2 per driver) equal to traveling wrong way or on wrong side of road, crossed centerline, or lost control and then limiting the occurrences of these to non-intersection sites. Maps and reports are subsequent to this selection.

Multiple fatality crashes were selected by identifying rural crashes and by querying for more than one fatality per crash. Maps and reports are subsequent to this selection.

Single-Vehicle Run-Off-Road (SVROR) crashes were selected by identifying rural crashes and then by limiting to single-vehicle crashes and then further querying for any Sequence of Event (up to 4 per vehicle) equal to ran off road, right; ran off road, straight; or ran of road, left. Maps and reports are subsequent to this selection.

The Safety Improvement Candidate Location (SICL) list was developed through a statewide process that considered all intersections

Past versions of the County Profiles.

This Iowa DOT page is maintained by Michael Pawlovich
Michael.Pawlovich@dot.iowa.gov
Your questions and comments are welcome.
©2009, Iowa Department of Transportation