Just rang the RTA, the current situation is that they will graciously allow us to use car etags. If it doesn't register on the RTz roads - Tunnel, Bridge, or Cross City, then they will send you a letter about 6 weeks later , and you send the letter back or ring them to tell them that you have a valid e-tag. Which, of course, they already knew, having found your rego number in the photo, so presumably they could call it up in the etag database and only call it up in the RTA database if it didn't have an etag. Your tax dollars at work. The M5 and M4 want you to use the motorcycle cards, meaning you have to go through the cash lanes. That's cos they say they don't recommend you hold it in your hand as you use the e-lane... However, they seem to have no trouble working out if you have an etag or not, and will debit you if the tag doesn't work. Zebee