I recently bought a 2018 Sport Hybrid and I've been trying to understand how TJA works. From what I currently understand, it can follow stop and go traffic and try to maintain lane as best as it can. Is there a specific way to activate it beyond the typical LKAS/ACC activation? I've noticed that when I set speed/follow, it would come to a full stop and the Heads Down Display would say "Stopped" and the car wouldn't start again until you either blip the gas pedal or hit the accel on the cruise control toggle. For some reason, I thought it would accelerate after a full stop, on it's own. The owners manual suggests to go to owners.acura.com for an online manual to further elaborate but I can't find one for the 2018 Sport Hybrid.

 

It's working as intended. TJA assist works just like typical LKAS/ACC function but I find it better at following at lower speed. At higher speed it tends to accelerate a bit to abruptly causing jerkiness. I use TJA often in LA traffic, works great most of the time.

 

I've use this feature a few times just jacking around. It seems to be active at speed below 25 mph and does a really good job following a vehicle in slow +/- 25 mph side streets speeds with 4-way stop signs (maintaining intervals, coming to complete stop, resuming after input from me). I could only get the system to resume in the ways you listed above. It would sometime accelerate pretty hard if the lead vehicle wasn't in ACC range when I resumed from a stop sign. Never really trust the system and usually drove with my foot over the brake a lot of times. Noticed the system isn't the quickest to engage sometimes from a stop and I would need to use more of the gas pedal a times. We just don't have enough traffic to get much use from traffic jam assist in ABQ.

 

Once you get to a full stop for about more than 1 second, as you mentioned the car will NOT resume on its own. At first it might seem annoying, but its for safety and you will get used to it. Imagine looking down at the radio or something and the car just starts going forward on its own. The blipping the throttle or hitting the resume button will feel like 2nd nature to you in no time