Chapter 5: Non-Freeway Resurfacing or Restoration Projects (2R)
Anchor: #CHDJEACESection 1: Criteria
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This section provides design guidance for 2R projects meeting all the following conditions:
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- Project is on a non-freeway facility; Anchor: #NAISQFAB
- Not on the National Highway System (NHS); and Anchor: #DIITHTVY
- Current ADT ≤ 2,500 per lane.
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.
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Restoration (2R) 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 2R project. The addition of continuous two-way left-turn lanes (TWLTL), 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.
If bicycle accommodations are provided, they must meet the requirements specified in Chapter 6, Section 4 (Bicycle Facilities).
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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.
Anchor: #i1007824Crash Analysis
A crash analysis (minimum of 3 years) must be conducted for 2R projects. Any specific areas involving high crash frequencies will be reviewed and corrective measures taken where appropriate in the current project or another project already in the planning stages. In addition to a formal analysis of crash data, Chapter 4, Section 3, Safety Enhancements lists several methods that have been used successfully to identify potential crash problems.