FARM-MARKET ROADS WIDENED AT LOW COST PER MILE
OLD SINGLE-LANE FARM-TO-MARKET ROADS IN FREDERICK COUNTY, MARYLAND, ARE BEING WIDENED AT AS LITTLE AS ONE-SIXTH THE COST OF FULLY MEETING STATE-AID DESIGN STANDARDS. A DESIGN ADEQUATE FOR THE TRAFFIC COUNTS, WITH 20-FOOT PAVED WIDTH AND MAKE-DO SHOULDER AND DITCH WIDTHS, COSTS ABOUT $25,000 PER MILE AS COMPARED TO $150,000 PER MILE FOR 24-FOOT WIDTHS. CONTRACTS AWARDED FOR SUCH WIDENING HAVE INCLUDED MINOR EASING OF CURVES AND CUTTING DOWN OF SHARP SUMMITS. THE CONTRACTOR TYPICALLY BEGINS BY TRENCHING DOWN FOR THE WIDENING, CUTTING A TRENCH SIX INCHES DEEP BY 4--4.5 FEET WIDE ALONG THE EDGE OF THE EXISTING PAVEMENT. THE TRENCH BOTTOM IS ROLLED, THE EDGE OF THE EXISTING MAT IS GIVEN A TACK COAT, AND A SIDE DELIVERY TYPE WIDENING MACHINE IS USED TO PLACE BITUMINOUS MIX IN THE TRENCH. THE BEST JOB IS OBTAINED BY PLACING A TWO-INCH BITUMINOUS CONCRETE OVERLAY OVER THE EXISTING ROAD AND THE WIDENED SECTION.
- Publication Date: 1972-8
Media Info
- Pagination: p. 44-5
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Serial:
- Rural and Urban Roads
- Volume: 10
- Issue Number: 8
Subject/Index Terms
- TRT Terms: Asphalt concrete; Construction; Contracts; Costs; Design standards; Overlays (Pavements); Pavement widening; Pavements; Paving; Roads; Rural highways; Secondary roads; State aid; Trenching; Width
- Uncontrolled Terms: Construction costs
- Old TRIS Terms: Pavement width
- Subject Areas: Administration and Management; Construction; Finance; Highways; Pavements;
Filing Info
- Accession Number: 00215552
- Record Type: Publication
- Files: TRIS
- Created Date: Dec 13 1972 12:00AM