Title

CURRENT STATUS AND VARIABILITY OF IN-SERVICE TRUCK TIRE PRESSURES IN TEXAS

Document Type

Journal Article

Publication Date

2003

Subject Area

infrastructure - vehicle, planning - surveys, mode - rail

Keywords

Wheel rail interaction, Variance analysis, Trucks, Tire temperature, Tire pressure, Tire pavement interface, Texas, T test, Surveys, Rolling contact, Road freight vehicles, Lorries, Linear regression analysis, Linear regression, Laboratory tests, Heavy goods vehicles, Cargo vehicles, Analysis of variance, Analysis of covariance

Abstract

Truck tire pressure is closely related to tire-pavement contact pressure and could be an easy index representing the tire-pavement contact pressure level. To characterize in-service truck tire pressures and truck configurations on Texas highways, a truck survey was conducted on major Texas trucking routes. The survey data demonstrate a significant increase in in-service truck tire pressures in the state of Texas. Analysis of the collected tire-pressure data showed that factors such as axle weight, tire temperature, geographic area, highway class, traveled distance, and axle type are related to the in-service tire-pressure values. In a survey study, a factorial experiment design and a stratified sampling design were used. Analysis of variance, analysis of covariance, and t-tests were used for comparisons of truck tire-pressure data. Laboratory experiments and linear regression were used to identify relationships between the parameters of tire pressure and tire temperature. The survey results for in-service truck tire pressures and the comparisons and analyses of factors differentiating truck tire pressures are presented.