How are features different with HDA?

[arencambre]

What exactly does HDA do for me? I am having a hard time discerning what it does.

It seems that all features that are available with HDA are also available on roads that do not qualify for HDA. All I can discern is two features work differently:

• Lane Keeping Assist (LKA) works all the way to 0 MPH. Without HDA, LKA seems to stop working under around 40 MPH?
• Smart Cruise Control (SCC) with Stop & Go does not require me to hit the accelerator or use the steering wheel resume button when stopped.

Are there any other differences?

In case it matters, I do not use the car's built-in navigation. I only use Waze.

 

[Kimberly Lazarski]

In HDA mode, the car nags you far less frequently to nudge the wheel, and another feature difference is if you set cruise control to the limit, it will auto-change the set speed as you move from one speed zone to another.