Members Only Section
Welcome to the TMMA Members Only Section. Here, you’ll find exclusive access to The Centerline newsletter archive, featuring important industry updates, expert insights, and strategic discussions relevant to TMMA members. Stay informed on the latest advancements in traffic marking standards, machine vision technologies, and policy developments—all curated to support your role in shaping safer, smarter roadways.
The Centerline Newsletter
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Machine vision detectability and maintenance standards
TMMA’s Traffic Safety Research Institute will host a March 6 session to provide potential insights for AV system developers who seek to refine operational design domains beyond the category of road network type, including highways and urban settings. This 45-minute session features three industry experts who will discuss proposed metrics road agencies may use in evaluating lane markings to support machine vision systems; correlations between traditional methods used for evaluating lane markings to support human drivers; the roles of contrast, gradient, edge detectability and commonly understood photometric properties like retroreflectivity and how contrast markings ensuring lane detectability. Please email [email protected] for more information.
Roadways 4.0 – Lane Marking Standards and Machine Vision Technologies
Andrew Whydell, vice president of global product planning for vehicle systems at ZF Group, will address this topic from the standpoint of machine vision technologies. Issues covered will include: Adoption rates for machine vision systems within the U.S. automotive market; How machine vision systems interpret lane markings and traffic control devices; How these factors influence highly variable situations, such as roadway work zones; How and where standardizing six-inch wide longitudinal lane markings should be prioritized; Why lag pattern contrast markings are preferable for machine vision; What agencies should consider when developing traffic control device standards for machine vision systems. Please email [email protected] for more information.