Draft Details

Designation:CSA EXP 150.2-2022
Contact name:Mahmood Nesheli
Review start date:Sep 1, 2022
Review end date:Oct 1, 2022
Contact email:kelly.yaremko(at)csagroup.org
Draft Scope/Description:

1.1 Inclusions

Several aspects of physical infrastructure were considered here, including the structural requirements for pavements and bridges; the quality and uniformity of traffic control devices (TCDs); and the changing demands of intelligent transportation system (ITS) devices with respect to adding new field equipment to facilitate vehicle-to-infrastructure communication. As such, the physical infrastructure to be covered under this guidance document can be categorized as:

·  Hard infrastructure (e.g., pavements and bridges),

·  Traffic control devices, and

·  Field equipment to support vehicle-to-infrastructure communication.

1.2 Considerations

This document is based on the current state of practice, which is in an early and developmental state.  There have been dozens of field demonstrations and early deployments to support advancing vehicle technologies, which continue to evolve and become more functional.  Additional collaboration between the roadway infrastructure and CAV industries (as well as other stakeholders such as researchers) will lead to new innovations and opportunities that are not yet fully understood. 

Users of this document should consider the timing differences between infrastructure enhancements, which can take several years to complete, versus vehicle evolution which happens at a quicker pace the infrastructure changeover versus the technology industry which moves even faster.  It is safe to assume that CAVs and human led vehicles will share the roadways for decades to come.  Therefore, if a policy change is made to upgrade or enhance an aspect of the physical infrastructure, considerations of the specific upgrade or enhancement should include current CAV technology as well as the next generation.  In addition, the roadway infrastructure owner should also consider the impacts from a design, construction, operation, and maintenance perspective.  The life-cycle differences between infrastructure changeover and CAV technologies are an important aspect of preparing roadways for CAVs. 

The roadway network has been designed for the conventional road user – a human driving a conventional vehicle without CAV features.  As the roadway evolves to accommodate safe deployment of CAVs, any CAV-supported changes to specific physical infrastructure assets must consider the impact of the human driver.  It will be decades or more where both human-led vehicles and CAVs will share the road network.  During this transitional period, upgrades or changes to the physical infrastructure assets should support both the conventional road user as well as CAVs. 

From a high level, one of the most common requests from the CAV industry regarding the roadway physical infrastructure is consistency and uniformity.  Consistency of application and uniformity of appearance.  Ideally, these topics would be coordinated globally but that level of harmonization is difficult and not likely.  Therefore, regional standards (by country) can be helpful to facilitate as much consistency and uniformity as possible. 

Finally, the material in this document is as fresh as possible during the time of the authorship.  However, the document will grow stale and need to be regularly updated as the topic area matures.

1.3 Terminology

This Document contains no requirements. In this Document, “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Document.

1.4 Units of measure

The values given in SI units are the units of record for the purposes of these Guidelines. The values given in parentheses are for information and comparison only.


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