For all of the times I've been to Vegas I never made it out to the Famous "Welcome" sign. This time one of my friends drove in from Phoenix, so we actually had a car to make the drive out here.
There is a parking lot for you to stop and get out and take pictures. I wouldn't suggest taking a cab since it's ridiculously expensive and the photo op is a few minutes at most.
I wish the stupid powerlines weren't in the background to ruin the picture. Besides that, for all that is in Vegas this is a classic that MUST be visited.