01732671

Component

http://www.trb.org/Publications/Blurbs/179567.aspx

The current rating systems for unpaved roads lack stability and reliability and, therefore, provide little benefit as a project- or network-level metric. Since many of these systems are derived from paved road assessment systems, they focus heavily on surface distresses rather than road width, drainage, and other features. Because unpaved roads can change rapidly, measuring surface distresses is an unreliable rating factor. The Inventory-Based Rating (IBR) System™ assesses unpaved roads on surface width, drainage adequacy and structural adequacy. These features impact road users and have significant costs associated with creation and maintenance. The system defines a baseline condition for each inventory feature with its tiered good–fair–poor rating. Five Michigan counties, selected based on their road network classification, participated in a pilot IBR data collection. User feedback was also collected from participants. The study showed very high repeatability and reliability of the IBR system. It also provided productivity benchmarking, which can forecast the time commitment for data collection. User feedback resulted in modifications to the system.

01730920

English

pp 408-423

2019-9

Transportation Research Circular

12th International Conference on Low-Volume Roads

Digital/other

Figures; References; Tables

Data collection; Drainage; Inventory; Structural analysis; Unpaved roads; Width

Michigan

Highways; Pavements

TRIS, TRB, ATRI

Mar 3 2020 2:18PM