SYSTEMS FOR BID ANALYSIS, GUARDRAIL LOCATIONS, CONSTRUCTION SCHEDULING, AND ESTIMATING EARTHWORK QUANTITIES

BID ANALYSIS. ADOPTION OF A NEW BID SYSTEM EASED SOME OF THE WORK LOAD ENTAILED BY MULTIPLE PROJECTS WITHIN A SINGLE CONTRACT AND FACILITATED CLASSIFICATION OF QUANTITIES FOR EACH IN THE PROPOSAL. IT ALSO ALLOWED SEPARATE PREPARATION OF SUCH ITEM SETS AS ROADWAY, SIGNING, LANDSCAPING, CULVERTS, AND BRIDGES AND USE OF THE COMPUTER TO COMBINE THESE SETS INTO A SINGLE PROPOSAL. THERE ARE APPROXIMATELY 500 STANDARD ITEM DESCRIPTIONS THAT ACCOUNT FOR ABOUT 90% OF ALL BID ITEMS EXCEPTING RIGHT-OF-WAY AND LANDSCAPE. NONSTANDARD ITEMS MUST BE WRITTEN OUT ON THE INPUT FORM. EACH ITEM RECEIVES A THREE-DIGIT CODE AND DESIGNATION OF ITS ITEM SET. BIDDERS MAY INDICATE ALTERNATIVE MATERIALS OR METHODS ON THE INPUT FORM. UNIT AND AVERAGE BIDS CAN BE MAINIPULATED IN A VARIETY OF WAYS BOTH FOR COMPUTATIONS AND REPORTS. A FEATURE OF THE PROGRAMS IS THAT CONTRACTS AND PROJECTS CAN BE COMBINED OR SEPARATED AUTOMATICALLY. GUARDRAIL LOCATIONS. THIS PROGRAM, WHICH IS A SUBSYSTEM OF THE EARTHWORK SYSTEM, ESTABLISHES WARRANTS ENTIRELY ON EMBANKMENT GEOMETRY AS OUTLINED IN NCHRP REPORT 54. THE METHOD CAN BE USED WITH AND WITHOUT A PLOTTER. WHERE A GUARDRAIL IS WARRANTED, THE SLOPE REQUIRED TO ELIMINATE THE NEED FOR THE GUARDRAIL IS PRINTED NEXT TO THE SLOPE USED IN THE COMPUTATION. THIS IS FOLLOWED BY CLEARING AND SEEDING AREAS AND THE DISTANCE FROM THE CENTERLINE OF LANE TO THE RIGHT-OF-WAY. THE STATION VALUE AT WHICH THE CROSS SECTIONS ARE TAKEN IS THE FINAL PRINT ITEM. CONSTRUCTION SCHEDULING. THE CRITICAL PATH METHOD HAS NOT PROVED SUCCESSFUL IN NORTH CAROLINA FOR THIS PURPOSE; A COMPROMISE METHOD IS PROPOSED BRIEFLY. ESTIMATING EARTHWORK QUANTITIES. FIELD AND PHOTOGRAMMETRIC METHODS OF DETERMINING CROSS SECTIONS HAVE BEEN COMBINED WITH A COMPUTER PROGRAM TO PROCESS THE RESULTS. THE OUTPUT IS EXCAVATION QUANTITIES AND, IF DESIRED, EMBANKMENT QUANTITIES AND BORROW PIT CALCULATIONS.

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: p. 59-62
  • Monograph Title: AUTOMATION SYSTEMS FOR HIGHWAY ORGANIZATIONS
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00203647
  • Record Type: Publication
  • ISBN: 0309019974
  • Files: TRIS, TRB
  • Created Date: Oct 9 2001 12:00AM