I recently began building my first Jurassic Park Era park in Sandbox Mode, and was completely flabbergasted to find that this isn't possible in the current version of the game! Granted I had never attempted to string multiple Tour buildings together before, but then upon going into a fresh Sandbox to check, I discovered this isn't possible with the Gyrostation or Jurassic Tour buildings in the Jurassic World Era either! I unfortunately had to abandon my entire park due to this, as my plan for the park wouldn't have worked without this feature... I really don't think this would be that difficult at all to implement, and you could even simply have the option to choose which Park Tour/Gyrostation/Jurassic Tour building would be the starting point for the tour. It may not sound like a big deal at first, but when you think about it this would open up a lot of new ways you could construct tours of your exhibits, and by extension, a lot of new ways you could design a park featuring any of these tour attractions. This would be ESPECIALLY useful in the Jurassic Park Era though, as you are limited to only the Park Tour when it comes to Attractions (ignoring the Aviary) and Dinosaur Visibility.
For those curious about my specific problem, I was building a Site B Nature Preserve using the new Isla Sorna - 1993 map, recreating The Lost World: Jurassic Park and Jurassic Park III using only novel and film-canon dinosaurs. The large central area of the park was the tourist hub featuring less dangerous species of dinosaurs, and there were Park Tour stations to the left and right ends of that area. These would use the narrow valleys and cliffsides of the island as tour routes, taking guests on a tour of either Sorna South (The Lost World) or Sorna North (Jurassic Park III). Halfway along each tour route would be another Park Tour station, allowing guests to stop off and stay in film-themed resort areas, visit either the South Aviary (featuring The Lost World-style Pteranodons) or the North Aviary (featuring Jurassic Park III-style Pteranodons), view the nearby dinosaurs through nature trails, or continue on the second half of the tour to loop back to the central tourist hub area. I had to abandon the entire half-built park due to not being able to simply link the central Park Tour buildings together with the North and South ones, which is something I assumed was already possible in the game.
For those curious about my specific problem, I was building a Site B Nature Preserve using the new Isla Sorna - 1993 map, recreating The Lost World: Jurassic Park and Jurassic Park III using only novel and film-canon dinosaurs. The large central area of the park was the tourist hub featuring less dangerous species of dinosaurs, and there were Park Tour stations to the left and right ends of that area. These would use the narrow valleys and cliffsides of the island as tour routes, taking guests on a tour of either Sorna South (The Lost World) or Sorna North (Jurassic Park III). Halfway along each tour route would be another Park Tour station, allowing guests to stop off and stay in film-themed resort areas, visit either the South Aviary (featuring The Lost World-style Pteranodons) or the North Aviary (featuring Jurassic Park III-style Pteranodons), view the nearby dinosaurs through nature trails, or continue on the second half of the tour to loop back to the central tourist hub area. I had to abandon the entire half-built park due to not being able to simply link the central Park Tour buildings together with the North and South ones, which is something I assumed was already possible in the game.
I also agree that the option to choose which direction the tour goes is absolutely vital as well now that you mention it.