Category: Department OrderSub Category: construction-materialsSeries: 2016No: 137Superseded by: DO_021_s2019File: DO_137_s2016.pdfDate: Tuesday, June 28, 2016Superseded Link: /sites/default/files/issuances/DO_021_s2019.pdfTags: International Roughness Index Values National Primary Roads materials BQS 137Bureaus and Services: Bureau of Quality and Safety