Here's an idea... don't drive 40mph over the speed limit.
Don't get me wrong, I speed... 10-15 over, but 40? I'm fine with that offender spending some time in prison.
Besides one of two outcomes will happen should you get caught.
1. If it's your first 30mph+ offense you won't go to jail (depending on your previous record of course). If it isn't... then you deserve to spend some time in prison.
2. You actually do get a prison sentence, but you can post bail until you actually have to go to prison.... Then once you report, you spend less than a month there because of overcrowding.