Unless I'm misreading the speedo, the word "transonic" is used somewhat inaccurately. If I'm not mistaken, the vehicle went transonic quite a bit before this point. The visible shockwaves only go on for a range of about 100mph, which seems too short for the passage from the initial transonic range to supersonic.

Sometimes stuff filed under THIS IS AWESOME isn't all that awesome. Today, that category doesn't do this justice. Wow. Interesting that you can see the typical sudden formation of condensation just as the speedometer indicates the shuttle going transonic.