Trick is to not give a fuck about how fast other people are going, and cruise at 65mph (105km/h) at a safe distance behind a combination tractor trailer.
You can drive without much stress, because impatient drivers don’t like to be in that spot behind a truck so you are less likely to be cut off. You’ll have plenty of time to react to anything in front, and also be safe in knowing that if there is a pileup ahead, a clear path will be smashed through for you.
Unfortunately, to get the benefit of the slip steam, you gotta be pretty close to the back of the truck. If you have space for good reaction time, you’re probably too far back
This is correct, especially at lower speeds. Greater fuel efficiency would come from lower wind and drivetrain resistance and use of a more efficient range of the motor’s powerband.
Most vehicles are geared for optimal speed to fuel consumption around 55-65 mph (90-100 kph) not 70+ mph (110+ kph). So just going a bit under the speed limit can have a significant impact on fuel consumption.
Yeah, be at least far enough back be able to see the truck’s side mirrors. 'Can’t speak for all truck drivers of course, but when I’m driving a big vehicle I actually like that someone “has my back” like this. It’s much nicer to have someone trailing me at a safe distance than to have an impatient driver trying to speed me up by traveling too close.
Also, following a truck will increase your mpg.
And not because of the lower air pressure zone behind the truck; you have to get dangerously close for that.
Truckers spend a fuck ton on fuel, so they have a huge vested interest in driving efficiency. My highway mpg rating is 27mpg, but I got 38mpg on an hour drive by chilling a safe distance behind a semi. It only added like 5 minutes tops to my trip.
Exactly. Similar to how others responded to a similar comment to yours, there isn’t much slipstream savings without getting into the danger zone of around 30m (100ft), which you can’t get with 3 second gaps at speed.
But you do get more fuel savings from driving at that slower speed, and from coasting and accelerating lightly/cruising. It perplexes me why people alternate gunning it with braking so much on the highway.
Agreed, provided you’re not driving very far.
I go on several hundred mile trips almost every year (usually ~800mi), and going 10mph over the limit saves over an hour and can be the difference between making it in one day and having to get a hotel.
So I’ll hang out behind semis on shorter trips (<200 miles) and speed ahead on longer trips. It costs more in gas, but I make up for it in other costs.
Thank you for being mindful of the passing lane and staying behind another slow moving vehicle if you are going to travel slower than the flow of traffic.
You are most welcome.
There is only one bone I have to pick with people who make “slower traffic keep right”, “the left lane is for passing”, and “the flow of traffic” type of comments. That is in the case of a commercial vehicle travelling 65mph passing another travelling 63mph. This is a perfectly valid use of the passing lanes on a highway, unless signs or local rules indicate otherwise (e.g. no trucks this lane). In this case, 65mph is the flow of traffic in that area and everyone behind should be aware that they are travelling faster than the flow of traffic until the pass has completed.
The worst part about this scenario is both trucks believe they’re in the right. They’re likely both set to cruise at the speed limit, but slightly out of calibration making them travel at slightly different speeds.
I 100% agree and have no problem with it, as long as they exit the passing lane as soon as it is safe to do so. Trucks almost always get this right, big SUVs almost never do.
Btw, it’s not safe to pass a big truck until you can see both headlights in your rear view mirror, assuming flat terrain. If you’re going downhill, give them even more space since stopping such a big rig can be very difficult.
…nothing at all wrong with overtaking at a 1 MPH differential as long as you keep right afterward…
