Going north bound on the southern part of the North Dallas Toll road there are a series of hills and dips . After coming up on one of these hills there was an ambulance coming from the opposite direction with their lights and sirens on . Just over the top there was a Jeep almost completely stopped , going ~ 10 - 15 MPH , in the far left lane . I tried to switch lanes but was traveling at the speed limit which left me without enough time / room . There was nobody in front of these people who stopped and a four foot concrete median dividing oncoming traffic . The other driver claims she stopped to yield for the ambulance but failed to yield to the right of the road as required . Which driver and insurance company is liable ? Other driver is filling bodily injury claims .