If you happen to see Viggo Mortensen on the streets of Erie this week, it’s not a mirage. The “Lord of the Rings” star and Academy Award-nominated actor will be at Presque Isle State Park on Thursday, shooting critical scenes for the major movie production of “The Road.” Mortensen, as well as actor Guy Pearce, who starred in “L.A. Confidential” and “Memento,” will be here with a film crew of 75 to 100 members, said Andrew Ullman, location manager for “The Road.” Stars follow ‘The Road’ to Presque Isle