Here's a map showing the proposed linear collider superimposed on a map of the Palo Alto / Redwood City area, with the correct linear scale: http://i.imgur.com

Here's a map showing the proposed linear collider superimposed on a map of the Palo Alto / Redwood City area, with the correct linear scale: http://i.imgur.com/Y6Nve01.jpg http://i.imgur.com/Y6Nve01.jpg At point "A" you can see the current Stanford Linear Accelerator complex for comparison. At 2 miles (3.2 km) in length, SLAC is currently the longest linear accelerator in the world. The ILC would be nearly 10 times the length. For further comparison, the main accelerator ring at CERN is 27 km in circumference, and the arms of LIGO are each 4 km in length.