I checked the original TFTL slingan map from the artbooks and the scale issue is from all the way back. Each km section should really be about 500m on the map.
At Stenhamra - coast to main road (Färentunavägen) is about 3 to 3,5 km
Okay, the distance ruler on the map actually shows 2500 meters (give or take 30 meters or so), or 590 meters to the centimeter. 8,5 mm equals 500 meters.
Here are the new dimensions of the particle accelerators:
Prim-1: diameter 14.4 km, circumference 45.2 km
Prim-2: diameter 11.1 km, circumference 34.9 km
Aux: diameter 8.5 km, circumference 26.7 km
It's still a very impressive facility, where the auxiliary accelerator has the same circumference as the Large Hadron Collider.
The map in the rulebook: 1 cm = 770 meters. The Boulder City map is correct.
Tänkte det kunde vara bra info till er andra också.