Gravel Road

General Resources

The pages below contain a variety of resources that may be of interest to a wide variety of entities both internal and external to the Dirt, Gravel, and Low Volume Road Maintenance Program.


GIS Mapper

All project tracking for the Dirt, Gravel, and Low Volume Road Program is done using an online GIS system called Mapper developed by the Center.  Conservation Districts can log-on to create projects and input data.  Public users can access an interactive statewide map of projects and information.


Technical Bulletins

Library of Center publications detailing specific "Environmentally Sensitive Road Maintenance" Practices. Each bulletin is grouped by topic area and is specific to one practice.


Driving Surface Aggregate (DSA)

In 2000, the Center developed an aggregate specification specifically designed for use as an unbound wearing surface aggregate for roads. DSA has been used on hundreds of miles of public road in Pennsylvania and was approved by PennDOT in 2008.


DGLVR Materials Calculator

This Center has created a materials calculator to help you conveniently determine aggregate, stone, and fill estimates for project needs. Visit the Road Aggregate and Fill Calculator page for more information and to use the calculator.


Road Work

As part of the training and outreach effort, the Center for Dirt and Gravel Road Studies uses demonstrations in the field as a tool to promote environmentally sensitive maintenance practices. The center also documents many of the projects in order to provide valuable educational tools. Documents detailing specific road projects are included here.


ESM Field Guide

This Field Guide is largely based on the practices and procedures implemented by the Center over the past 15 years through Pennsylvania's Dirt and Gravel Road Maintenance Program.