Chapter 5: Non-Freeway Resurfacing or Restoration Projects (2R)Anchor: #CHDJEACE
Section 1: OverviewAnchor: #i998687
The following guidelines apply to non-freeway resurfacing or restoration (2R) projects which are not on National Highway System (NHS) routes, and have current average daily traffic (ADT) volumes of 2500 per lane and less. Projects with current average daily traffic (ADT) volumes greater than 2500 per lane and projects which are on NHS system routes may not be designed to 2R guidelines.
These guidelines should also be used in determining design scope and estimating cost for individual candidate projects whenever a restoration program is being developed. Preliminary structural planning should be coordinated with the Bridge Division.
Definition. Restoration projects are defined as work performed to restore pavement structure, riding quality, or other necessary components, to their existing cross section configuration. The principal purposes of these projects are surfacing and repair of the pavement structure. The addition of through travel lanes is not permitted under a restoration project. The addition of continuous two-way left-turn lanes, acceleration/deceleration lanes, turning lanes, and shoulders are acceptable as restoration work as long as the existing through lane and shoulder widths are maintained as a minimum. The restoration work may include upgrading roadway components as needed to maintain the roadway in an acceptable condition.
Upgrading. Where the work is cost effective and funds are sufficient to upgrade to reconstruction or rehabilitation design criteria without jeopardizing district priorities for other restoration work, development of projects to higher criteria may be done at the district’s discretion.
Crash Analysis. A crash analysis should be conducted for 2R projects. Any specific areas involving high crash frequencies will be reviewed and corrective measures taken where appropriate. In addition to a formal analysis of crash data, Chapter 4, Section 3 lists several methods that have been used successfully to identify potential crash problems.