AASHTO
This is the nickname for AASHTO’s Policy on Geometric Design of Highways and Streets due to its cover color.
What is the Green Book?
A survey method where respondents record their daily trips in a diary format.
What is a travel diary?
ITE’s Sustainable Transportation Initiative aims to reduce emissions by promoting these modes. (Name 1)
What are public transit, biking, or electric vehicles?
The minimum vertical clearance for railroads over highways per AASHTO standards.
What is 23ft?
The Green Book’s minimum width for a shared-use path accommodating bicycles and pedestrians.
What is 10ft? (14ft preferred)
The Green Book defines design standards for this largest vehicle class, including tractor-trailers and buses.
What is WB-50 (WB-67 for larger interstates)?
A model that estimates the probability of travelers choosing different modes (e.g., car, transit, bike).
What is a logit model?
ITE’s founding in 1930 was driven by the rise of this mode of transportation.
What is the automobile?
The required sequence for railroad flashing light signals when a train approaches.
What is alternating red lights?
This MUTCD-defined area gives pedestrians priority over vehicles, marked with white stripes or contrasting pavement.
What is a crosswalk?
This term describes the banking of curves to counteract centrifugal force.
What is superelevation?
The responsiveness of travel demand to changes in price or service quality.
What is demand elasticity?
This transportation professional currently serves as the President of ITE, advocating for safer and smarter mobility solutions worldwide.
Karen Aspelin, PE
The maximum recommended grade for a highway-rail at-grade crossing per AASHTO.
What is 5%?
NACTO’s Urban Street Design Guide recommends this curb extension type to shorten crossing distances.
What is a bulb-out (or neckdown)?
The Green Book recommends this minimum corner radius for low-speed urban intersections.
What is 15ft?
The phenomenon where increased road capacity leads to more traffic over time.
What is induced demand?
ITE collaborates with this federal agency to develop the Manual on Uniform Traffic Control Devices (MUTCD).
What is the FHWA (Federal Highway Administration)?
NACTO recommends this speed limit for street-running light rail in mixed traffic.
What is 25–35 mph?
ITE’s Recommended Practice suggests this illuminance level (in lux) for midblock crossings.
What is 20 lux?
AASHTO’s maximum recommended entry speed for single-lane roundabouts.
What is 25mph?
Geographic areas used to aggregate travel data in demand models.
What are traffic analysis zones (TAZs)?
This city will host ITE’s 2025 Annual Meeting & Exhibition.
Where is Orlando FL?
This iconic Amtrak route, named after a Steve Goodman song, runs overnight from Chicago to New Orleans, serving Memphis along the way.
What is the City of New Orleans?
MUTCD requires this interval for pedestrian 'WALK' signals before the flashing 'DON’T WALK'.
What is 7 seconds?