![]() DIB 86: Selecting Asphalt Binder Type has been incorporated into the Jupdated edition of the HDM and the DIB 86 has been discontinued.DIB 81: Capital Preventive Maintenance (CAPM) Guidelines (PDF).DIB 79-03: Design Guide and Standards for Roadway Rehabilitation Projects (PDF).CT 356: Methods of Test to Obtain Flexible Pavement Deflection Measurements for Determining Pavement Rehabilitation Requirements (PDF).Providing technical support, training and guidance to District personnel for CADD roadway design software, drafting software, and engineering GIS applications. California Highway Design Manual (HDM): Chapter 630 - Flexible Pavement (PDF) Establishing flexibility in Caltrans highway design standards and procedures, especially in the context of urban environments and multi-modal design.Traffic conditions, climate, geology, materials, construction, and economics are variables that demand the fullest application of professional engineering judgment and skills. It is not possible to formulate one set of design criteria that could meet the requirements of every road everywhere. This application helps you design a flexible pavement using the approach outlined in the Highway Design Manual (6th edition) published by the California Department of Transportation (CALTRANS). The engineering design of flexible pavement structures is not an exact science. A highway pavement is several layers of materials above the natural soil. There are also two types of rubberized OGFC mixes: rubberized hot mix asphalt-open graded (RHMA-O) and RHMA-O-high-binder (RHMA-O-HB). ![]() Common types of flexible pavement include hot mix asphalt (HMA), rubberized hot mix asphalt-gap graded (RHMA-G), and open graded friction course (OGFC).
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