Hi All, The issue with downhill coasting, which is not hypermiling coasting, is that transmissions may not reingage into a gear if the road gear gets going much faster than the engine driven gear in the car. This is apparent in manual transmission cars, in that if one revs the engine, the gear drops back in at a lower force. With typical hypermiler skill this is not an issue. But, down a steep hill, an inexperienced person may not know that he/she has to rev the engine to get the gear to drop in. Not being able to get the gear to drop, then denies the operator engine braking, which on a steep long hill is required to avoid brake overheating. An inexperienced operator may panic and force the gear in, which can damage the synchros, and make the gear hard to engage accellerating as well. Many older trucks do not have synchros. So, it takes a whole bunch more skill to get the gear to drop in on a down hill. And the weight of the vehicle can fry a clutch, if the operator does not match engine to road speed and just lets the clutch out quickly. A fried clutch denies the vehicle engine braking. Which is a great big problem in a fully loaded truck on long downslopes. It seems to me that CT Highway patrol is overreaching as they have forgot the spirit of the law (see above) and are only left with the letter of the law. The term "downgrade" in the spirit of the law implies a long hill. But, to the letter of the law, it can mean any low slope, which may not even result in a terminal speed greater than the speed limit. These are the more common hypermiling fair. I saw a thing on You Tube, where the driver was engine off gliding ( I call it this, as this is the common Prius terminology) with an automatic transimission, in-gear. Apparently, as the engine died, he went full throttle, and the engine was back driven by the transmission. This is kinda like a Prius above 40 mph, but not quite. The open throttle allowed the car to pump air through the engine, and the braking effect was less. I believe it was a fuel injected car, hopefully with fuel cut mode. This would not save gas in a carboraetor car. In the Prius the engine does not turn faster than 1100 rpm, limiting the airflow through the engine. Seems a DOHC engine would work very good for this, there is much less engine braking with DOHC engines. So, to restart he only had to put the car in run. No starter needed. This might be a legal way around the letter of the coasting laws, albeit not as efficient. One problem I can think of is that the air will cool down the Catylitic converter. This was an mid 80's car that it was being done on. The other problem was the electronic speedometer would go off when he was gliding. So, it seems like the CT Highway Patrol might be called the SMOG-MAKERS Patrol. By enforcing the letter of the law, people will be forcing to generate lots of extra HC emissions, to save gas, to deal with the expense of driving.