You are here

IBTTA’s transportation Glossary of Terms is an ever-changing list of terms used within the transportation and tolling industry.

The Glossary was updated in March, 2016.  If you have suggestions for future additions, please contact us.

  Download the Glossary of Terms.
 

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | U | V | W
Titlesort descending Description
HCM

Highway Capacity Manual. An engineering reference manual for road design.

HCR

High Capacity Road

HGV

Heavy Goods Vehicles. Typically refers to trucks over 3.5 tons

HMI

Human-Machine Interface. A front-end user interface.

Hot Lanes

High Occupancy Toll (HOT) lanes are High Occupancy Vehicle (HOV) lanes that also allow access to low occupancy vehicles if drivers pay a toll. It is a type of managed lane. This allows more vehicles to use HOV lanes while maintaining an incentive for mode shifting and raising revenue. HOT lanes are often proposed as a compromise between HOV lanes and Road Pricing.

HOV Lanes

High Occupancy Vehicle lanes. Lanes typically reserved for vehicles with two or more occupants.

Hub

Or “Clearinghouse Hub”, is a node on the Clearinghouse Network, interfaces to all other Hubs on the Clearinghouse Network.