No need to be concerned about hypersonic velocities. Hypersonic is generally referred to as speeds above Mach 5. Transonic might be a concern but since sonic velocity is 331.2 m/s the pod could go a long way in a very short time even at subsonic speeds.

For example, at 300 m/s (~90% of the speed of sound), the pod would be moving at 1080 kph or 671 mph. The distance between Los Angeles and San Francisco is 347 miles as the bird flies so travel time would be 31 minutes at 300 m/s speed. Take some time to accelerate and more time to decelerate and trip time approaches 35 minutes which sounds familiar.

Someone should check my arithmetic!