On 2015-04-12, Ed Pawlowski wrote:

from fading on a long hill. I've seen more and more of those signs
popping up nd I guess it will continue until there is a bad accident
from a truck losing its brakes.

Other more enlightened towns have an "engine brakes must be muffled"
sign. IOW, engine brakes can be muffled jes like regular engine
exhaust. Truckers don't need these brakes in town, but get lazy and
use 'em for slowing to take the wear/tear off their main braking
systems, which are expensive to replace.

nb