Lane narrowing reduces the width of the travel portion of a lane and gives drivers a feeling of constraint that can influence them to reduce their speed.
Lane narrowing reduces the width of the travel portion of a lane. Narrowed lanes provide a feeling of constraint that can influence drivers to reduce their speed. Lanes can either be physically or visually narrowed. Physical narrowing is achieved through construction efforts such as widening or adding center islands, curb build-outs, or chicanes. Visual narrowing is often a maintenance effort which re-orients the longitudinal pavement markings resulting in a reduced lane width. This section discusses the following narrowing treatments:
Development of this website was financed in part through funds provided by the Iowa Department of Transportation and Federal Highway Administration state planning and research funding.
The contents of this website reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented herein. The opinions, findings and conclusions expressed in this website are those of the authors and not necessarily those of the sponsors.
The sponsors assume no liability for the contents or use of the information contained in this website. This website does not constitute a standard, specification, or regulation.
The sponsors do not endorse products or manufacturers. Trademarks or manufacturers' names appear on this website only because they are considered essential to the website's objective.