Transportation Glossary
Term Description
Automated Voice Annunciator System (AVAS)
An electronic audio and visual announcement system which provides the next bus or train stop information for passengers. The audio portion is based on a public address system and the visual uses an electronic message sign for announcements. Integrated as part of an Advanced Transportation Management System (ATMS), the AVA system uses information from the Automatic Vehicle Location (AVL) system and the AVA database to determine when to make the announcements and what announcement will be made.