01105407

Component

The Maryland State Highway Administration (SHA) owns and maintains 15,000 lane miles of mainline road network of which 98% is Hot Mix Asphalt (HMA) surfaced. The pavement friction survey includes collecting information on other roadway and pavement condition features such as traffic, location, test speed, date of testing, etc. The friction data in SHA’s database is managed by the Pavement Management Division, which is charged with receiving pavement condition data from the Exploration Division and maintaining the data. The pavement friction surveys in Maryland are conducted using the locked wheel pavement friction tester attached to a truck. The test vehicle used by SHA in the friction surveys is usually calibrated to conduct surveys at 40 mph. However due to speed limit restrictions and road usage, the test crew is sometimes forced to take readings at speeds less than prescribed by the manufacturer. Twenty percent (20%) of the friction values in SHA’s database were taken at speeds less than 38 mph. Currently at SHA, there is no correction applied to the friction numbers recorded at low speeds. The data that was used for this analysis was obtained from roadways located in six of the twenty-three counties in Maryland. The results of the analysis show that there is an inverse relationship between speed and friction values.

01084478

08-0764

English

19p

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures; References (9) ; Tables (6)

Condition surveys; Friction tests; Hot mix asphalt; Pavement design; Pavement maintenance; Pavement management systems; Pavement performance

Pavement conditions; Test speed

Maryland

Highways; Pavements; I23: Properties of Road Surfaces

Transportation Research Board Annual Meeting 2008 Paper #08-0764

TRIS, TRB

Jan 29 2008 3:05PM