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Roadway Narrowing: Pavement Markings | Safe Design

Roadway Narrowing: Pavement Markings

Image Source: FHWA

DEFINITION AND DESCRIPTION

Roadway narrowing is often done as part of resurfacing or roadway improvement projects. It may include repurposing additional paved space with markings or physically removing unused paved areas. Narrower lanes encourage reduced operating speeds, and excess width may be used to accommodate complementary safety strategies.   

Implementation Categories

Area(s) Design and Geometrics, Traffic Operations and Operations & Maintenance
Safety Category 2

CONSIDERATIONS

  • Space freed up by narrowing lanes can be used for wider centerline buffers, non-motorized uses, parking, or wider shoulders that can accommodate rumble strips in rural areas.
  • May be considered as part of resurfacing projects to minimize cost.
  • Reduces speeds 2 mph – 3 mph (NCHRP 737).
  • Large vehicle operations may be impacted.
  • KYTC’s Highway Design Guidance Manual outlines minimum widths of travel lanes for different roadway classifications.

APPLICATION

  • May be used:
    • For local, collector, and arterial streets where sufficient width is available.
    • In speed transition zones alongside other traffic calming strategies.
    • On high-speed rural roads to increase shoulder widths where wide striped lanes are present.
  • Pavement marking updates can be coordinated with the pavement resurfacing schedule.

example

Image Source: FHWA

Complementary SSA Strategies

REFERENCES AND RESOURCES

FHWA, Selecting Pedestrian Safety Improvements https://pedbikesafe.org/PEDSAFE/countermeasures_detail.cfm?CM_NUM=18

FHWA, Traffic Calming ePrimer. https://highways.dot.gov/safety/speed-management/traffic-calming-eprimer#eprimer

KYTC Complete Streets, Roads, and Highways Manual, 2022. https://transportation.ky.gov/BikeWalk/Documents/Complete%20Streets,%20Roads,%20and%20Highways%20Manual.pdf

Torbic, D., D. Gilmore, K. Bauer, C. Bokenkroger, D. Harwood, L. Lucas, R. Frazier, C. Kinzel, D. Petree, and M. Forsberg, NCHRP Report 737: Design Guidance for High-Speed to Low-Speed Transition Zones for Rural Highways, Transportation Research Board of the National Academies, Washington, D.C., 2012.  https://www.nationalacademies.org/read/22670

Do you have more questions? Get in touch!

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CONTACT:

Jill Asher

Research Engineer 

jill.asher@uky.edu