Planning
This federal act funds infrastructure improvements, including roads, transit, and EV charging.
What is the Infrastructure Investment and Jobs Act (IIJA)?
The term for an area with frequent crashes or above-average crash rates.
What is a high-crash location or hotspot?
These visual elements on roadways guide and warn drivers, such as signs and markings.
What are traffic control devices?
A system that integrates connected vehicles and infrastructure for safer, more efficient travel.
What is Intelligent Transportation Systems (ITS)?
This federal initiative promotes installing chargers every 50 miles on key corridors.
What is the Alternative Fuel Corridors Plan?
These facilities encourage walking and biking within communities.
What are active transportation facilities?
This measure is used to estimate expected crashes using roadway characteristics and traffic volumes.
What is a Safety Performance Function (SPF)?
The distance a driver needs to perceive, react, and stop safely.
What is stopping sight distance?
The components that detect vehicles at intersections.
What are loop detectors or vehicle detection systems?
This national funding program supports EV charging infrastructure across corridors.
What is NEVI (National Electric Vehicle Infrastructure Program)?
This microscopic simulation software allows visualization of traffic operations in 3D.
What is VISSIM?
This federal database compiles fatal crash data across the U.S.
What is FARS (Fatality Analysis Reporting System)?
This term describes a lane that widens or tapers to accommodate turning movements.
What is a turn bay or auxiliary lane?
This system allows buses to request green extensions at traffic signals.
What is Transit Signal Priority (TSP)?
This U.S. DOT program helps rebuild bridges in poor condition across the country.
What is the Bridge Investment Program?
This four-step process includes trip generation, trip distribution, mode choice, and route assignment.
What is the Urban Transportation Modeling Process?
The most common type of crash at signalized intersections.
What is a rear-end crash?
This design tool ensures roadway elements align with human visual perception and comfort.
What is context-sensitive design?
The concept of vehicles communicating with each other and with infrastructure.
What is V2X (Vehicle-to-Everything) communication?
This federal grant program supports data-driven roadway safety plans and projects.
What is Safe Streets and Roads for All (SS4A)?
The process of managing roadway access points to preserve safety and mobility.
What is Access Management?
The national strategy that aims to eliminate traffic fatalities and serious injuries.
What is Vision Zero?
This design concept reduces conflict points by replacing intersections with circular movement.
What is a roundabout?
A real-time system that adjusts signal timing based on actual traffic conditions.
What is adaptive signal control?
This emerging technology allows digital simulation of entire transportation networks.
What is a Digital Twin?