sorta. At least my canine, Preston.
It’s called The Bike Tow Leash.
The engineering of this thing is nothing short of miraculous. (Or maybe not, since it was invented by a mechanical engineer who trains service dogs…) In a number of ways, but the leading one is the way it somehow, and I cannot explain how, manages to control lunging. Squirrels, cats, other dogs… they are all still interesting, but all attempts to drag you and the bike into a faceplant fail.
This video shows at around :50 a big dobie lunging with a little rider, and while the rider does go a little to the left, they just keep pedaling and the dog has to just keep going forward. I can tell you from my personal experience that you almost don’t even feel the lunge, especially if you have any kind of pace going. The only time it destabilized me at all was in the first few minutes we were testing it and I was on the sidewalk going very slowly. And my dog is very distractable and very powerful - I have never had so much control over him in his entire 5 years of life.
AH, I found a bit of explanation on the site:
My dog has never had an opportunity to go into a full run for more than a few yards, and by our second trip (I’m keeping the trips very short, a few times around the block, to build his fitness and his pads. He would happily wear himself out until he was sick and so it’s my job to keep him from doing that.) he had it figured out and was in a full out gallop without any prompting from me, I pretty much let him set the pace. And yes, he can and did pull me, hence I think the “tow” part of the name.
In addition to controlling lunging, it keeps him pretty much exactly where you want: about 18" to the left, right next to you. The leash is flexible enough to allow him to go back or forward, but stiff enough to make the direct-left position the default.
Attaching it to the bike is incredibly easy, and the only thing I would say about that is be very sure you have tightened it down as much as you can, as that would be the only way the leash would fail, is if the attachment was loose. Be very careful.
What’s very interesting, and perhaps a Doper can 'splain, is that the leash can be adjusted to a new, permanently stiff position up or down (It should fall at the dog’s shoulder height naturally) by pouring rubbing alcohol into the channel! Wait two minutes, adjust as needed, wait 15 minutes for it to dry and stiffen again. I haven’t had to do this, but I saw it in a video. What substance is lubed/softened with rubbing alcohol and returns to stiffness when dry?
Anyway, if you enjoy your bicycle and you would like to take your dog with you, chances are your dog would be thrilled to be included and this is the sure bet for doing it safely for both of you. I researched the hell out of bike leash options, and this is a case of something being the most expensive option for a very good reason: it’s far and away the most well-designed of all the options.
My dog is in heaven.