LATM DESIGN OPTIMISATION: CAN WE PLEASE EVERYONE? FIFTH NATIONAL LOCAL GOVERNMENT ENGINEERING CONFERENCE, SYDNEY, AUSTRALIA, 24-29 SEPTEMBER, 1989

Local area traffic management (LATM) is an important part of today's society. Although there are a large variety of goals that form the basis of LATM, it appears that there is a general agreement that LATM aims at improving safety and residential amenity, including objectives regarding issues such as noise and landscaping. The effects of LATM on two levels of environmental and operational objectives have been examined using a number of schemes in the Sydney metropolitan area. The data available for these areas indicate that LATM is particularly effective in reducing traffic volumes, in the order of 20 per cent. Immediately adjacent to traffic control devices traffic speeds may be reduced to an average of 25 km/h. Midblock between devices the differences between the before and after situations are mostly in the order of 5 km/h, which is generally not statistically significant. If speeds of 40 km/h are to be achieved, the distance between devices should not exceed 120 m. There is little difference in the speed reducing effect between the various devices investigated. As a result of the reductions in speeds and volumes a significant reduction in crashes has been achieved. There is some indication that severity rates have reduced as well, but the number of very severe crashes is too small to have statistical bearing. Local residents appear to be over represented in crashes on local streets in the municipality where they live. The limited information on traffic noise indicates that a slight increase in noise levels may be observed at devices with increased acceleration and deceleration patterns. It also appears that the general noise level of 55 db(a) for quiet residential streets is much exceeded at the sites investigated. (TRRL)

  • Availability:
  • Corporate Authors:

    Institution of Engineers

    11 National Circuit
    Barton, A.C.T.,   Australia 
  • Authors:
    • Van Den Dool, D F
    • FISHER, A J
  • Publication Date: 1989-9

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00609836
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0-85825-471-9
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM