too bad you don't live in dc to see the real precautions. the motorcades are unbelievable. when AF 1 lands at andrews, dca is shut down, and i'm not sure, but iad and bwi are also probably affected.
however, it is pretty standard to run a helicopter fleet from white house to andrews. they fly fairly low and no particular precautions are taken down the standard route of the suitland parkway.
when bush spoke somewhere in baltimore, and came up by motorcade, I 95 was shut down both ways from early morning until after lunch.
there are extra precautions taken when potus presence is known, and known in advance. the presidential schedule is top secret.(not a joke)