Im sure that Crypmobiles are preregistered on the System and are certified to be modified for private use ,A taxi is a Commercial Vehicle for the purpose of the Toll .If taxis were toll free Bernard Scullion from the Flats ,Not Dommos Flats crosses over the East Link every day .It would be worth is while buying a Part worn Jock Crypmobile plating it up claim the tax writeoffs and free toll and sure he might even do a bit .