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Maintenance

Maintenance and repairs.

A techno-economic model is developed based on road-load simulation results expressed in relation to slip energy (SE) at the tire–pavement interface and the repair and maintenance (R&M) cost obtained from published sources and data from state agencies. Tire SE allows for the consideration of aggressive acceleration and deceleration, high torque conditions (for instance, driving an upslope grade), and roadway curvature. Tire SE data used in this effort were generated using physics-based simulation models of different vehicle types for arrays of road conditions (e.g., grades, curvatures) and driving cycles (i.e., vehicle speed profiles). R&M costs were estimated for various vehicle categories and accumulated vehicle mileage. The approach is based on relating the probability density functions (PDFs) of SE and R&M costs. Asymptotic series expansion for an incomplete gamma function was used to approximate the gamma functions and to determine the gamma ratio function that is used as the coefficient to SE to estimate R&M costs. The average R&M cost per mile results from the model compared with the arithmetic mean R&M cost data from fleet operators and published data. The model can serve as a method for predicting R&M cost as a function of road load to vehicle fleet.

2003 - Improved Maintenance Relationships
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 556.83 KB
 25-06-2019

TRL Report R7456 - Excellent report describing a study into maintenance relationships with data from India, Indonesia and Ghana

2003 - Dunkerley - Improved Maintenance Relationships
 1253 Downloads
 3.05 MB
 25-06-2019

Report describing vehicle maintenance and repair relationships.

A report on the study to obtain better vehicle maintenance cost relationships for HDM-4. Report describes the data collection and preliminary analysis of Indonesia maintenance cost data.

A report on the study to obtain better vehicle maintenance cost relationships for HDM-4. Report describes the data collection and preliminary analysis of Indian maintenance cost data.

A report on the study to obtain better vehicle maintenance cost relationships for HDM-4. Report describes the data collection and preliminary analysis of Ghanain maintenance cost data.

1998 - Revision to HDM-4 Parts Model Parameters
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 64.08 KB
 25-06-2019

Memo describing revisions to parts model parameters

1996 - Parts Consumption Modelling in HDM-4
 931 Downloads
 24.97 KB
 25-06-2019

Memo describing issues with parts modelling
Original proposal for HDM-4 maintenance cost modelling

1995 - Cundill - Proposed HDM Maintenance Relationships
 771 Downloads
 1.22 MB
 25-06-2019

Report presenting initial proposal for how to model vehicle maintenance and repair costs.