CAD/CAM PAVEMENT MAINTENANCE ACTIONS - AN EFFICIENT METHOD TO REDUCE HUMAN WHOLE BODY VIBRATIONS

For rough road sections, traditional pavement maintenance actions such as the 2" overlay is quite efficient in reducing ground vibrations, vehicle body noise, rolling resistance and re-establishing bearing capacity as well as a nice looking surface. The overlay is also often efficient in reducing vertical and horizontal whole body vibrations (WBV) in vehicle cabs, interfering with vehicle occupant's comfort, activities and health as described in ISO 2631-1. Shocks must be limited with respect to injured patients in high-speed ambulance transports, while vibration dosis (time * intensity) limits must comply with occupational health exposure limits, regarding professional truck drivers. New knowledge has revealed that also rotational vibrations roll, pitch and yaw cause human physiological/pathological and behavioral responses. Therefore those vibration modes were incorporated in the 1997 revision of ISO 2631-1. To reduce these vibrations, focus needs to be set also on road slopes and crossfall. Extremely low frequency vertical vibrations - 0,1 to 0,63 Hz - cause motion sickness, which is a severe problem during emergency ambulance transports. No vehicle suspension can reduce these random and non-periodic slow vibrations when they are caused by a poor road roughness profile. This document provides an introduction to the Swedish specification of a geometrical pavement model, developed especially for use in road maintenance projects where Computer Aided Design - and also Computer Aided Manufacturing - will be used. Use of the new specification gives the prerequisites needed to supervise crossfall variations and long-wave roughness. This in turn leads to the possibility to - within the budget frame of the road maintenance project - optimize actions to reduce road defects that causes unnecessary human whole body vibrations. For the covering abstract see ITRD E108018.

• Corporate Authors:

  DUTCH-HUNGARIAN ORGANIZER AND CONSULTING LTD

  SZILAGYI U 3
  BUDAPEST,   Hungary  H-1081
• Authors:
  • Granlund, J
• Conference:
  • FIRST EUROPEAN PAVEMENT MANAGEMENT SYSTEMS CONFERENCE - PROCEEDINGS AND FINAL PROGRAM, BOOK OF ABSTRACTS
  • Location: Budapest , Hungary
  • Date: 2000-9-24 to 2000-9-27
• Publication Date: 2000-9

Language

• English

Media Info

• Features: References;

Subject/Index Terms

• TRT Terms: Highways; Maintenance; Networks; Roads; Texture; Vibration
• Uncontrolled Terms: Road networks
• ITRD Terms: 2755: Highway; 3847: Maintenance; 1053: Road network; 3053: Surface texture; 5558: Vibration
• Subject Areas: Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00808097
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Apr 4 2001 12:00AM