Lets see – cow water bed mats, inflatable door seals, inflatable containment barriers or my best brainstorm a length of 3” or 4” lay flat fire hose (or lay flat sprayer hose for that matter) plumbed to a small pressure tank used on wells and filled with antifreeze mix (RV or regular). Fill with air to what-ever pressure need. Just make certain that you have enough expansion volume for the liquid displacement from tired driving over it. Glue it down with exterior polyurethane.