Pursuant to the Texas Emergency Vehicle Laws, and especially Section 546 thereof, a firetruck is permitted to park or stand in any road in performance of its duties, and a firefighter is permitted to close any road or highway in order to do so. So the entire premise of this episode is false.
When Vega (Gina Torres) is trying to call Pearce at the softball game, she is holding her iPhone upside down as you can clearly see the camera lenses on the back are on the bottom. The same error is seen when she goes to text him a few moments later.