Our house has a driveway that is just about big enough to park 2 cars side by side on, but it's tight. Currently we park in something like a brick pattern that allows us to open the car doors easily and not block each other in.
It would be ideal to widen the driveway slightly to allow us to park next to each other and be able to get out of the car without stepping onto the grass of the front garden (gets muddy in winter or wears and unsightly bare spot in summer)
It's not enough of an issue to make resurfacing the whole drive worth it. And I think a strip of new tarmac next to the current drive would look shit. But would a gravel age look ok? It would only be one side as the tarmac goes right up to the boundary on the other side