Glossary of Terms
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.
Title |
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. |
