Traffic Speed Report No. 116 : Interim Report

Abstract

This report is an analysis of spot speed observations made during the summer months, viz. June, July, August and September, of 1982 in Indiana. All observations were made of free-flowing vehicles on level, tangent sections of rural and urban highways under favorable conditions. All the observations were made during daylight. This is the second report with exclusively summer observations since 1975. From 1976 until 1980 (Traffic Speed Reports Nos. 95 through 114) 14 primary and secondary stations as well as another 14 randomly selected stations were monitored every quarter. During 1981 and 1982 only 14 primary stations were monitored. A total of 14 speed monitoring stations were used for the study reported herein. These stations are divided into four categories, including four rural interstate locations, four rural four-lane locations, four rural two-lane locations and two urban interstate locations. These 14 locations are the same as the primary and secondary control stations monitored since 1975 in Indiana. Prior to 1975 only the twelve rural stations were monitored. The locations of the 12 rural stations are essentially the same since 1970 except for stations 4L-32 (old number 6 on US 52) and 2L-54 (old number 11 on US 31), which changed in 1975. The speed limit at all the stations is 55 mph. The vehicles were classified as Indiana or Non-Indiana Passenger Cars and light (less than 5000 lbs. gross weight) or heavy (equal to or more than 5000 lbs. gross weight) trucks. Analysis was performed for each vehicle classification and for combined passenger cars or trucks.