CHP can be stealthy here from Apple Valley to Yucca Valley (Becomes 18 at Lucern where 247 turns North to Barstow). They have forward and reverse speed detection. They sit on side roads that are hidden and can clock you before you can react. It is a open hwy where you can see for miles and you can get impatient and put on the gas, but best to keep it in cruise control at 65. It use to have some 55 MPH sections. As a retired Paramedic I understand the concern because this hwy is very similar to the Pearblossum Hwy (138) which was once called one of California’s bloodiest Highways. I believe it hasn’t had the notoriety is because the count is much less. Still an accident out there is problematic because response time will be curtailed.