The Surface Transportation Assistance Act of 1982 increased the Federal funding for highway improvements by well over 50%. In that act, Congress also directed that a large portion of the non-Interstate funds be used for resurfacing, restoring, rehabilitating and reconstructing (3R/4R) existing highways and bridges in a manner which would enhance highway safety. The extent of appropriate safety improvements on 3R/4R projects varies depending on a number of factors. Appropriate safety improvements include better skid resistance quality of the pavement; cross-slope changes to improve drainage; superelevation corrections; better signing, marking and delineation; regrading of roadside slopes; removal or upgrading of roadside hardware; and removal or mitigation of hazardous roadside features. Designing the rehabilitation of a highway is a greater challenge to the skills of highway designers than is the designing of a new highway. For a 3R project, designers cannot simply lay a template on the paper and proceed. They need to use accident and traffic data and all that is known about safety design to custom tailor safety into the remodeled highway.

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Filing Info

  • Accession Number: 00396048
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 30 1985 12:00AM