From Midnight tonight til Tuesday evening at 5pm, Downtown Phoenix is going to sound an awful lot like the Fast and the Furious or perhaps the Indy 500, as race-organizers test some new sound-muffling technology to protect a 911 call center downtown. Check out the course map for the tests ^[1], and note that tests will be during the day tomorrow, so get ready for some loud noises as part of the setup for this fall’s downtown rally.