9 computer hardware and software system for use in vehicle fleet management that integrates a global navigation satellite system (gnss) with wireless transmitters and receivers and is used to track, locate and monitor vehicles and mobile assets; computer programs, namely, downloadable computer software having a map-based location and management system for use by vehicle fleet operators for use in tracking vehicles and mobile assets, communicating with remote mobile device terminals, extracting engine diagnostic data, and integrating with third party computer systems; computer software for accessing vehicle subsystem data from vehicle on-board diagnostic devices for monitoring engine performance, fuel efficiency and driving behavior, and to permit remote diagnostics; downloadable computer software used for transmitting location, usage and diagnostic data from gps-enabled tracking and locator devices based in vehicles and other mobile assets to a computer server that is accessed via a web portal interface and via mobile communication devices; downloadable computer software for use in tracking and monitoring driver hours of service, driver vehicle inspection reports and data and voice communications between drivers and dispatchers for the purposes of fleet management and driver compliance tracking; vehicle on-board diagnostic devices for capturing engine diagnostic data; vehicle telematics and engine data monitoring devices that connect to a vehicle's diagnostic system to detect and record vehicle speed, engine RPMs, oil pressure, seatbelt use, time spent idling, fuel levels, ignition timeouts, airbag operation, excessive braking, engine oil temperature, headlights, warning lights, parking brake data, cruise control data, transmission fluid levels and the number of times a driver places a vehicle in reverse; driver monitoring and feedback devices comprised of electronic sensors, memory, storage, and alarms, to detect and record driver activity and driver and passenger seatbelt usage, to maintain driver logs, driver risk and safety reports, driver ratings, driver dispatching, and hours of service compliance, to generate audible alerts to notify drivers of unsafe or potentially risky driving events, and to generate audible vehicle in-reverse alerts; vehicle position and movement tracking devices that utilize global positioning systems; vehicle tracking, locator and recovery device comprised of cellular radio modules, computer software, computer hardware, sensors, transmitters, receivers and global positioning satellite receivers programmed to use a global navigation satellite system (gnss) with wireless communication networks all for use in tracking, monitoring, transmitting and analyzing vehicle usage, operation, location and diagnostic data and information; telematics apparatus, namely, wireless Internet devices which provide telematic services and have a cellular phone function; downloadable computer software applications for assigning and distributing work assignments to multiple service resources over multiple days, planning service areas, determining service area sizes, determining available service resources, and allocating service resources to service areas to avoid overlap, scheduling resource shifts, specifying resource skills, identifying where resources can work, and building service resource rosters; downloadable computer software applications for assigning resources to customer appointments and generating efficient routes, scheduling service delivery times and assigning appropriately skilled resources, guiding service planners through same-day schedule changes, new orders and route re-assignments, tracking fleet vehicles and personnel and providing engine diagnostics, route information and related reports, alerts and messages, presenting and analyzing cost and performance trends based on GPS data and operational business metrics, logging order status, running equipment diagnostics, requesting home verifications, accessing repair schematics and customer history, and providing order status alerts, and providing performance reports and comparing operational metrics and other data