In 38th part you can go around the fence, that's what we did. But be careful after 24th as 25th starts from further and quite illogical place compared with 26th you might skip it by accident as we did. Quite nerve wrecking. Would suggest bicycle or if you do it by car then kickbike. Quite often it's just fustrating.

Well selected routes and you can split your work easily f.ex. when there are connections available by train between parts of the town.

The only remarkable challenge is the portal 4 in mission 38 which is inside the museum (ufo formed space for living named Futuro). I jumped over the closed park door behind the museum and walked 20 meters to hacked that before the guards where there. You start the mission 39 immediately in museum (open) area so be quick and disappear.
You can also buy the ticket to the museum during its open hours.

It took 7,5 hours in a row bicycling.