See the Endeavour Transported in Awesome Time Lapse [Video]
So, on the ground, the Endeavour could only be transported at very low speeds, to avoid damaging adjacent buildings, trees or signposts. The shuttle was towed by a Toyota pick-up truck at less than 3 km/h (2 mph), over a distance of 19 km (12 miles), so it took a really long time.
However, courtesy of The LA Times, we now have a three-minute long video, showing the entire journey in a stunning time lapse. You can really see and appreciate the scale of the operation, all the planning involved, and the fact that in the end everything wen smoothly and without a hitch.