Do you have a RFID or swipe card you use for your staff to access you building? Why not incorporate this exact same method into your forklift driver access as well? This will stop untrained and unwanted people from using your forklifts, such as truck drivers who are common offenders. The Sapphire LCD and Sapphire Lite both have multiple types and brands of swipe cards which can be integrated into the system to aid your forklift control.
Forklift driver access control methods