John E Tidwell

IMPROVING SAFETY AT PASSIVE CROSSINGS WITH RESTRICTED SIGHT DISTANCE

Jack B Humphreys, John E Tidwell, 1982 .

DRIVER AND PEDESTRIAN COMPREHENSION OF PEDESTRIAN LAW AND TRAFFIC CONTROL DEVICES

John E Tidwell, Devin P Doyle, 1995 .

Driver knowledge of grade-crossing information

Jack B Humphreys, John E Tidwell, 1981 .