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General

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Legacy ID
21

Local Roads

CFLHD Supplement 9.3.1.2.1-1 Purpose: This supplement describes the process for selecting to use the AASHTO Guidelines for Geometric Design of Very Low-Volume Local Roads (ADT = 400). Approved: 11/21/2008 Pages: 1

Documenting Design Exceptions (CFL)

CFLHD Supplement 9.1.3.4-1 Purpose: This supplement provides guidance in documenting exceptions to Highway Design Standards within CFLHD using the Highway Design Standards form. Approved: 11/21/2008 Pages: 8 References: Mitigation Strategies for Design Exceptions - FHWA-SA-23...

Data Exchange Standards

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The following information supplements PDDM Section 9.6.6.4

Data Exchange Standards

There are numerous software products used in construction. These may have proprietary design formats not...

Level of Detail

The following information supplements PDDM Section 9.6.1.

Digital Design Data

Develop highway design surveys and road designs using Bentley GEOPAK and/or(?) Open Roads software. Provide design data in native MicroStation file formats...

Earthwork Design

The following information supplements PDDM Section 9.5.1.

While roadway excavation is not classified for measurement or payment purposes, it may be categorized for computation of earthwork design and mass purposes as the following types:

  1. ...

Design Procedures Guide

The Design Procedures Guide provides basic guidance, recommended procedures, and instructions for developing and documenting the highway design. This includes fundamental steps for developing the geometric design and preparation of plans, specifications and estimates (PS&E...

PDDM Archives

The PDDM was first published in 1988 in English units. It was re-released in 1996 as a Metric document. Beginning in 2005 the document was published with dual units. The following archived versions of the PDDM are available for reference purposes ONLY within Federal Lands Highway offices (see...