Air speed check
Publisher: Illinois State Police
Published: 1999
Place of publication: Springfield, Ill.]
Language: eng
Subjects: Illinois State Police. Air Operations Bureau; Motor vehicles; Measurement; Aeronautics in police work; Illinois State Police; Speed; Traffic police; Speed limits
Other titles: Illinois State Police
Description: Explains how the Illinois State Police Air Operations Section computes motor vehicle speed from an airplane using road markings and an electronic timer.
Notes: Cover title.

"8/99"--Colophon.