Who's responsible for fixing a shared access road?

We had almost the same setup at our old place, a quarter-mile lane serving five houses with no HOA and nothing on paper. What we did was just sit down over beers and work out a split, and honestly the usage-based arguement carried the day. The guy running a business out of his place paid double what the retired couple paid. Nobody loved it but it kept the peace, and that's worth more than the couple hundred bucks difference. The legal reality is murkier than the county made it sound. Even if the road is private, an easement for access usually exists if you've all been using it openly for years, and in most places the upkeep cost can legally be shared among the people who benefit. But actualy getting a court to apportion it by traffic counts would cost way more than a dump truck of gravel, so a lawyer is overkill at this stage. What I'd do is put a short written agreement togehter, who pays what, who hires the guy, keep a copy, and sign it. Next time it needs work you're not renegotiating from scratch.

One thing I'd push for regardless of who pays: fix the drainage, not just the ruts. We regraded our lane with a slight crown in the middle and cut a shallow ditch along the uphill side, and it went from needing gravel every spring to going four or five years between top-ups. If you just fill the ruts flat, the next rain parks water in the low spots and you're buying gravel again by fall. Also worth checking your county GIS or assessor map before you fully accept the 'private road' answer. Ours showed up as a platted lane on the original subdivision map, which changed the conversation a bit when I brought a printout to the road department. Didn't get them to maintain it, but it clarified who legally had what rights, and that made the neighbor conversation a lot easier.

This makes me think about my mom's place. Her lane crosses a corner of the neighbor's field before it gets to her house, and that neighbor acts like he owns the whole thing because of it. Whenever there's a pothole he says it's her problem since she's the one complaining. So my question is, does it matter whose land the road actually sits on when it's time to pay? Like if two of the four houses don't even touch the part that's washed out, can they still be asked to chip in? I honestly have no idea how that works.

We're on a shared lane too and the thing that finally got everyone moving was getting one written quote from a local gravel guy and emailing it to all four households at once. Once people saw an actual number instead of vague talk, they stopped dragging their feet. Also don't be the one who quietly pays first, that sets the tone for the next twenty years. Our guy at the end paid more too since his box truck chews up the surface, and he didn't even argue about it once he saw the math.