ITE Journal - August 2020 - 27

shutterstock/ Tjeerd Kruse

SAFETY

Turbo
Roundabouts:
Design, Performance, and U.S. Opportunities
By R.J. Porter, Ph.D., P.E., Jeffrey Gooch, P.E., Catherine Chestnutt,
Brian Moore, P.E., Jaap Tigelaar (M), and Jeffrey Shaw, P.E., PTOE, PTP, RSP1 (M)

I

ntersection-related crashes contribute significantly to traffic fatality and injury numbers
in the United States. Approximately half of all crashes and half of fatal and serious injury
crashes occur at or near intersections. In 2018, 8,858 people were killed in intersection
and intersection-related crashes.1 In contrast, there were a total of 46 fatalities at

roundabouts built in the United States over the nine-year period spanning 2005 to 2013, a time
period in which the total number of roundabouts in the United States grew from a few hundred
to a few thousand.2 Roundabouts reduce the severity of intersection conflicts by lowering
speeds and decreasing conflict angles, principles consistent with the Safe System approach to
intersection design.
w w w .i t e.or g

Augu st 2020

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ITE Journal - August 2020

Table of Contents for the Digital Edition of ITE Journal - August 2020

ITE Journal - August 2020 - Cover1
ITE Journal - August 2020 - Cover2
ITE Journal - August 2020 - 3
ITE Journal - August 2020 - 4
ITE Journal - August 2020 - 5
ITE Journal - August 2020 - 6
ITE Journal - August 2020 - 7
ITE Journal - August 2020 - 8
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ITE Journal - August 2020 - 25
ITE Journal - August 2020 - 26
ITE Journal - August 2020 - 27
ITE Journal - August 2020 - 28
ITE Journal - August 2020 - 29
ITE Journal - August 2020 - 30
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ITE Journal - August 2020 - Cover3
ITE Journal - August 2020 - Cover4
https://www.nxtbook.com/ygsreprints/ITE/ITE_Sept2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_Aug2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_July2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_June2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_May2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_April2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_March2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_February2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_January2020
https://www.nxtbook.com/ygsreprints/ITE/ITE_December2019
https://www.nxtbook.com/ygsreprints/ITE/G110939_ITE_November2019
https://www.nxtbook.com/ygsreprints/ITE/G110110_ITE_October2019
https://www.nxtbook.com/ygsreprints/ITE/G110109_ITE_September2019
https://www.nxtbook.com/ygsreprints/ITE/G108559_ITE_August2019
https://www.nxtbook.com/ygsreprints/ITE/G108250_ITE_July2019
https://www.nxtbook.com/ygsreprints/ITE/G107225_ITE_June2019
https://www.nxtbook.com/ygsreprints/ITE/G104039_ITE_May2019
https://www.nxtbook.com/ygsreprints/ITE/G104038_ITE_April2019
https://www.nxtbook.com/ygsreprints/ITE/G104036_ITE_March2019
https://www.nxtbook.com/ygsreprints/ITE/G103582_ITE_February2019
https://www.nxtbook.com/ygsreprints/ITE/G102868_ITE_January2019
https://www.nxtbook.com/ygsreprints/ITE/G100155_ITE_December2018
https://www.nxtbook.com/ygsreprints/ITE/G100154_ITE_November2018
https://www.nxtbook.com/ygsreprints/ITE/G99495_ITE_October2018
https://www.nxtbook.com/ygsreprints/ITE/G98028_ITE_September2018
https://www.nxtbook.com/ygsreprints/ITE/G97366_ITE_August2018
https://www.nxtbook.com/ygsreprints/ITE/G96287_ITE_July2018
https://www.nxtbook.com/ygsreprints/ITE/G94315_ITE_June2018
https://www.nxtbook.com/ygsreprints/ITE/G93877_ITE_May2018
https://www.nxtbook.com/ygsreprints/ITE/G93065_ITE_Apr2018
https://www.nxtbook.com/ygsreprints/ITE/G91484_ITE_Mar2018
https://www.nxtbook.com/ygsreprints/ITE/G89434_ITE_Feb2018
https://www.nxtbook.com/ygsreprints/ITE/G86608_ITE_Jan2018
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