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The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.

Title:

Evaluation of Wide Edgelines on Two-lane Rural Roads

Authors:

Benjamin H. Cottrell, Jr.

Year:	1985

VTRC No.:	85-R37
Abstract:	This interim report presents the results of an evaluation of 4-in and 8-in wide edgelines on the lateral placement and speeds of vehicles on two-lane rural roads. Data were collected at twelve locations on sections of roadway covering 55.2 ml. Two methods of painting the 8 in width were also analyzed. It was concluded from analyses of variance of lateral placement, lateral placement variance, encroachments by cars and trucks, mean speed, and the speed variance that, overall, there were no statistically significant differences between the 4-in and 8-in wide edgelines. The mean lateral placement was significantly lower for the 8-in line. However, changes in lateral placement and speed were neither statistically nor practically significant.