1) get a vehicle with a sun/moon roof
2) get a high-quality, hi-def video camera
3) get a high-quality video tripod
4) attach camera to tripod
5) open sun/moon roof
6) set up tripod in vehicle so camera is positioned outside the vehicle through the sun/moon roof
7) align camera to face front (direction of travel)
8) turn on the camera as you leave the interstate and ensure it is recording
9) leave camera on until you arrive at your parking lot
10) disassemble the camera/tripod rig and be sure to close your sun/moon roof
11) enjoy your day in the park
12) return to hotel
13) upload video to personal computer
14) obtain high-quality video processing software
15) fast forward to the point in the video where signs are clearly visible and neatly framed
16) do a frame capture and save to .jpg picture
17) post the .jpg picture to your blog, personal website, and/or DISBoards
...or you could just open up Google Earth and copy this Street View image...