How connected vehicles work.

NHTSA · 2011 · ROSA P / United States. Joint Program Office for Intelligent Transportation Systems

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Summary

This document, published by the U.S. Department of Transportation’s Intelligent Transportation Systems Joint Program Office in 2011, outlines the potential of connected vehicle technology to transform surface transportation. The primary motivation is to shift the transportation paradigm from crash survival to crash prevention, addressing critical challenges in safety, mobility, and environmental impact. The text highlights that motor vehicle crashes are a leading cause of death for individuals aged 3 to 34, with 32,788 fatalities recorded in 2010. Additionally, significant resources are wasted due to congestion, with travelers losing 4.8 billion hours in traffic in 2010, and 3.9 billion gallons of fuel wasted in 2009. The proposed system relies on a safe, interoperable wireless communications network that enables connectivity among vehicles, infrastructure, and wireless devices. Safety-related systems are expected to utilize Dedicated Short Range Communications (DSRC), a technology similar to WiFi that operates on a dedicated spectrum to ensure speed, security, and reliability. Non-safety applications may employ different wireless technologies. The architecture is designed to be an open platform, allowing for the development of various products and applications while maintaining anonymity to prevent vehicle tracking and ensuring security against tampering. Connected vehicles function by continuously sharing real-time safety and mobility information. Vehicle-to-vehicle (V2V) communication allows cars, trucks, and buses to "talk" to each other, providing drivers with 360-degree awareness of hazards such as blind-side vehicles, merging trucks, or sudden braking ahead. Vehicle-to-infrastructure (V2I) communication alerts drivers to conditions like icy roads, dangerous curves, school zones, work zones, and upcoming traffic light changes. These warnings are intended to be non-distracting, activating only when danger is imminent. The significance of this technology lies in its ability to enhance safety, mobility, and environmental sustainability. By providing real-time data, the system aims to reduce crashes involving unimpaired drivers and lower fatality rates. For mobility, anonymous signal data helps transportation managers analyze travel patterns to reduce congestion, while applications can assist users in finding parking, locating taxis, or ensuring transit connections. Environmentally, the technology supports greener choices by helping drivers avoid unnecessary stops and congestion, thereby improving fuel efficiency and reducing greenhouse gas emissions, which account for roughly 28% of U.S. emissions. The U.S. DOT, through agencies like NHTSA, FHWA, and FTA, is actively working with public and private partners to address technical, safety, and policy challenges to deploy this transformative system.

Key finding

Connected vehicle technology utilizes wireless communication between vehicles and infrastructure to provide real-time safety warnings and mobility data, with the potential to significantly reduce crashes, congestion, and environmental impact.

Methodology

review

Provenance

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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• v2x connected vehicle