EFFECT OF ROADSIDE OBSTRUCTION ON SPEED AND PLACEMENT OF VEHICLES ON TWO LANE ROADS

This paper studies the effect of roadside development and obstructions on speed and placement of a vehicle on two lane roads. Data were collected at 12 sites, each having obstructions of different types and at varying distances from the pavement edge. The mathematical equations relating maximum deflection of a vehicle to the distance of the obstruction from the pavement edge are developed. These relations indicate that a car is deflected from its normal path by 1.8m when a car is parked on the pavement edge. It is increased to 1.9m and 2.0m when the parked vehicle is a tractor and a truck respectively. The effect of an obstruction diminishes when it is at 10-12m from the pavement edge. Therefore, any developmental or commercial activity should be located at least this distance from the pavement edge. Further, data collected for speed and volume on two lane roads without encroachment and with encroachment on one side and with encroachments on both sides indicated that capacity of the road is reduced by 13.2% due to one side encroachment and 22.6% due to both side encroachments.

Language

  • English

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Filing Info

  • Accession Number: 00964336
  • Record Type: Publication
  • ISBN: 087659229X
  • Files: TRIS, ATRI
  • Created Date: Oct 9 2003 12:00AM