98% of the time it's just me and one bike in the Corola sedan so I use an old
Rhode Gear trunk mount rack. Since it's just one bike, I bobbed ithat rack to a "one holed". Very easy to put the bike on to and to remove. Easy to install on the trunk lid and easy to remove. I added felt to the rubber holders where the TT rests to minimize paint damage. I also added Velcro straps to the downtubes to hold the wheels steady. Some added security but primarily keeps the wheels from windmilling along, grinding the paint off the bumper cover.

When I go road trip on the interstates I put the bike in the back seat and the rack into the trunk. No reason to sandblast the frame for hours or to hose the bike down in hours of rain.