Abstract: An apparatus that restricts or disables electronic device functionality based on vehicle status data received from the on-board computer (“OBD”) of a public service vehicle. In some embodiments, the vehicle status data is accessed from the OBD through an assembly line diagnostic link (“ALDL”) connector, which eliminates any need for modification of the vehicle during installation. If the software determines the vehicle status data is outside a preset range, which could be customized on a case-by-case basis, the on-board computer of the vehicle could be restricted or disabled until the vehicle status data returns to within the preset range.