The Construction Manager wireless solution uses GPS technology to locate and manage assets at sites via Nextel handheld phones. It also provides in-vehicle devices to optimize asset utilization and productivity of mobile assets. Users can download maps and site designs to their Nextel phones. Jobsite boundaries can be sent to the phone so that site managers are notified if a worker enters a hazardous or unsafe zone. The product uses one interface for both the handheld and in-vehicle components, allowing users to manage all assets from one software interface.