ITE Journal - March 2021 - 41

be expensive in rural areas and cost can impact the decision to
install a roundabout. Gblogah's international literature search
found that many countries around the world do not illuminate
rural roundabouts, and that partial illumination can provide up
to 80 percent of benefits of full lighting at roundabouts.11 Lighting
of rural intersections continues to be a topic of continued research
considering benefits and costs to installation and maintenance.

Conclusion
Safety data tell us that people are less likely to be involved in a
serious crash at a roundabout than many other intersection types.
With hundreds of rural roundabouts operating across the United
States, it is safe to say that lives have been saved at these intersections. The versatility of rural roundabouts provide flexibility
and opportunity, in application from two-lane roads to divided
roadways and both balanced and unbalanced traffic flows at the
intersections. With purposeful consideration for design features
that reduce approach speeds and provide conspicuity without
over-design and excessive costs, a rural roundabout may be our
next opportunity to save a life. itej

References
1.	 NHTSA, https://www.nhtsa.gov/research-data/fatality-analysis-reportingsystem-fars (Accessed January 29, 2021).
2.	 FHWA Proven Safety Countermeasures, https://safety.fhwa.dot.gov/
provencountermeasures/roundabouts/ (Accessed January 29, 2021).
3.	 AASHTO, 2010. The Highway Safety Manual, American Association of
State Highway Transportation Professionals, Washington, D.C., http://
www.highwaysafetymanual.org.
4.	 Jacquemart, G. NCHRP Synthesis of Highway Practice 264: Modern
Roundabout Practice in the United States. Transportation Research Board.
National Research Council, Washington D.C., 1998.
5.	 Rodegerdts, L et al. NCHRP Report 572, Roundabouts in the United States.
Transportation Research Board. Washington D.C. 2007.
6.	 Isebrands, Hillary and Shauna Hallmark, " Roundabouts on High-speed
Rural Roadways: A Statistical Analysis of Crash Data that Verifies High
Safety Performance " Transportation Research Record 2312, Journal of
the Transportation Research Board, Transportation Research Board of the
National Academies, Washington, D.C., 2013. Pp 3-13.
7.	 Furgeson, E et al., NCHRP Report, 888, Development of Roundabout
Crash Prediction Models and Methods, Transportation Research Board of
the National Academies, Washington, D.C (2019).

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