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COMPUTER-AIDED DESIGN AND DRAFTING

Computer-aided design and drafting (CADD) is the process of interacting with a computer and graphic images to produce drawings of a design, with productivity improvements possible from: faster placement of standard and repeated symbols; faster changes during initial drawing creation; rapid placement of notes; rapid creation of detail sheets; automatic creation of bills of materials, cross-section and profiles; and finalizing drawings created by engineering computation programs that may have to be manually traced then finalized. A CADD system can have many benefits. Accurate, up-to-date and high-quality drawings can be produced. For the many user groups in the roadway industry, these drawings can be redrawn in several scales and details at a dramatic reduction in time and cost. Similarly, the cost of maintaining and storing drawings is considerably less. Surveys sponsored by the TRB Committee on Computer Graphics and Interactive Computing of state DOTs using CADD systems have found that productivity ratio averages (manual time: CADD time) for major applications were about 3:1. 3:1.

Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/1519687
Authors:
- Johnson, K H
Publication Date: 1985-6

Media Info

Features: Tables;
Pagination: p. 18-20
Serial:
- Better Roads
- Volume: 55
- Issue Number: 6
- Publisher: James Informational Media, Incorporated
- ISSN: 0006-0208
- Serial URL: http://www.betterroads.com

Subject/Index Terms

TRT Terms: Computer aided design; Computer graphics; Consumer behavior; Data collection; Drafting; Highway design; Productivity; State departments of transportation; Surveys
Uncontrolled Terms: Increase; Interactive graphics
Old TRIS Terms: User reactions
Subject Areas: Bridges and other structures; Design; Highways; Pavements; Planning and Forecasting; I21: Planning of Transport Infrastructure;

Filing Info

Accession Number: 00454328
Record Type: Publication
Files: TRIS
Created Date: Aug 27 2004 10:00PM