Collision is avoided after car pulls onto busy highway

This is dashcam video of a near collision on a newly constructed section of highway 72 in Plainville CT. You can see a 4-door white car come from the side street on the right and cut in front of the 2-door white car. The car had to hit its breaks and maneuver out of the way. This could have been bad if not for the quick reflexes of the 2-door car. Since this is a newly build highway that was over 30 years in the planning and making, the traffic pattern is still getting some used to by commuters. The side streets along the highway in this area used to be residential housing with little to no traffic. There have been numerous accidents along this short stretch of road probably as a result of unfamiliarity or drivers still getting used to the change. It is always possible that it was inattentive or distracted driving too. There also isn't a "no turn on red" for the side street. There should be.