ITE Journal - April 2020 - 39

Volpe, the National Transportation Systems Center (USDOT).

Figure 1. Map of V2X deployed by state and local governments throughout the United States.
are deployed with aftermarket V2X communications devices."8
USDOT adds that more than 6,000 infrastructure V2X devices have
been installed at the roadside in 25 states, as shown in the graphic
put together by the USDOT Volpe National Transportation Center
(Figure 1). For example, a Safety Pilot Model Deployment program
in Ann Arbor, MI, USA in 2012 used CAV technology in more than
2,800 vehicles at 29 infrastructure sites to test the effectiveness of
CAV crash avoidance systems. After the success of this program,
the USDOT proposed rulemaking to require vehicle-to-vehicle
(V2V) communication capability for all light vehicles and set the
minimum performance requirements and the standard features used
on the interface required to establish interoperability for V2V Safety
Awareness communications. The project in Ann Arbor continues
by the University of Michigan Transportation Research Institute
and its partners, which have expanded the infrastructure footprint
from Northeast Ann Arbor to the entire 27 square miles (44 square
kilometers) of the city, and increased the number of RSUs from 25 to
75.9 More than 2,500 CAVs have been equipped with DSRC, paving
the way for federal funding from the USDOT for three test sites:
Wyoming; New York City, NY; and Tampa, FL.10
SPaT Challenge. DSRC pilot deployments are also being
encouraged by the Signal Phase and Timing (SPaT) Challenge, an
effort led by ITE, AASHTO, and ITS America. Working together

through the Cooperative Automated Transportation Coalition,
the initiative challenges transportation infrastructure owners and
operators to deploy a V2X communications infrastructure with
SPaT broadcasts in at least one corridor in each of the 50 U.S. states.
A SPaT message defines the current intersection signal phases; the
current state of all lanes at the intersection are provided, as well as
any active pre-emption or priority.11
Twenty-six states have committed to the SPaT Challenge, with
more than 2,000 signals planned. This challenge encourages the
continued development and deployment of V2X technologies,
helping these communication methods keep pace with the other
rapidly developing features of automated vehicles. The challenge is
critical, as there is no government-based requirement to develop
such technologies. Furthermore, participation in the SPaT
Challenge shows a commitment to DSRC infrastructure to auto
manufacturers and applications developers.

FCC Proposal
The official Notice of Proposed Rulemaking (NPRM) to change the
safety spectrum was issued by the FCC on February 6, 2020-but
long before that, the FCC indicated it was considering making
changes to the spectrum. One of FCC's commissioners, Jessica
Rosenworcel, stated in 2018 that the DSRC has not reached its full
w w w .i t e.or g

Apri l 2020

39


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ITE Journal - April 2020

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

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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
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https://www.nxtbook.com/ygsreprints/ITE/G104038_ITE_April2019
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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
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