Second Life needs a Route 66. (Maybe 67 if calling it the real one is too much?)
Like a fully signposted historic route that just goes through nearly everything on the mainland.
People will come to drive the whole route as a cultural pilgrimage and people will want to set up roadside attractions and it would be like a homage to the real route 66.
I don't think it would actually take too much work. We can piggy back off the existing road network and simply add some new signage. A few new bridges or tunnels might be necessary to connect some continents and make a long continuous route. But I think it would be worth it and make a huge new landmark/attraction in Second Life of sorts.