Michigan Codebooks

Michigan 2001 Codebook. UMTRI Transportation Data Center. July 2002.
[ Full Text ]

The 2001 Michigan census accident file contains 400,813 records, the vehicle file contains 692,653 records, and the occupant file contains 722,552 records. In addition to the census data sets, a truck data set has been built that contains 14,468 accident records, 27,794 vehicle records, and 28,782 occupant records.

The 2001 Michigan pedestrian and bicyclist records were not all processed correctly. Approximately half of these records indicate "driver" for occupant position and this is the only identification available for the nonmotorist vehicle record (V101 Vehicle Type is "other".) The crash-level flags, V50 Flag:Pedestrian and V52 Flag:Bicyclist correctly identify all such crashes as they used information not subsequently available on the computerized crash record. The variable V51 Flag:Nonmotorist Record Present is not correct as it relied on the driver position variable.