Accessories for logic units in the nature of automatic voice announcement systems, automatic vehicle monitoring systems and automatic vehicle location systems used in urban transit vehicles, namely, automatic vehicle location devices programmed to use global positioning systems (GPS); automatic vehicle monitoring devices in the nature of engine speed indicators, vehicle speed indicators, oil temperature and pressure indicators, coolant temperature indicators, other engine operation indicators, vehicle position indicators, time indicators, and vehicle subsystem on/off indicators; wireless communication devices in the nature of devices for wireless radio transmission, cellular data modems and devices operating on a wireless LAN, namely, computer hardware in the nature of wireless access point devices; computer workstations for dispatch of transit vehicles, comprising server and client devices in the nature of communications servers and computers; computer software for the dispatch of transit vehicles and automated vehicle location; global positioning system receivers; software for the creation of automated announcements on transit vehicles; software for mapping and geo-coding, namely mapping addresses and other spatial features allowing input into geographic information systems; data management software for managing data related to vehicle position, vehicle announcements and vehicle operating indicators; report generation software in the field of schedule adherence, route adherence and passenger counts; passenger advisory devices in the nature of electronic signs and automatic audio announcement systems; passenger counting devices in the nature of optical passenger counting devices