What makes this crossing different
Verkhny Lars is the only operating land crossing between Russia and Georgia, so everything funnels through it: private cars, coaches and freight together. Queues build up on holidays and at the end of long weekends, and the road on both sides runs through the Darial gorge, which can close at short notice in winter for snow and avalanche clearance.
That makes the insurance the easiest part to take out of the queue. A policy bought online is registered against the plate before you arrive, so the vehicle check at the Georgian post is a lookup rather than a purchase.