Your car's navigation will never, ever, ever route you to the 303. That's because, based purely on mileage, it is always out of the way. But here's the thing: If you ever dare to venture the 10-15 miles out of your way, ignore the incessant route recalculations on your navigation system, and take the lovely, practically brand-new stretch, you'll discover that it takes exactly the same amount of time to get to where you were going as if you had taken the 101 or Grand Avenue. The only difference is, you'll be cruising along at top speed, without any traffic to distract you from your car karaoke. If your route should take you north, the section from Interstate 17 westward is an especially beautiful drive, the empty stretch lined with saguaros and jagged mountain peaks. Sure, you'll put more mileage on your car, but it's a hell of a lot nicer than watching taillights during rush hour, and sometimes, an even faster way to get to where you're going.