There is a workaround for this, which is to use a service like JMP.chat to redirect SMS to XMPP, at which point you only need to ensure internet which is a bit of a lower requirement than specific networks (but of course may still become more limiting over time)
Interesting to see how different that is from Australia. In your example only lane 3 is a passing lane, and “undertaking” isn’t a thing, it’s completely legal to overtake in any lane.