Tonight I was on a long stretch of highway and used a couple of features I don't often use together - LKA/LFA and cruise control. I noticed that after I had LKA/LFA on, when I started cruise control, my head up display said "HDA". I quickly gathered that HDA was a multi-function function which included cruise and LKA/LFA, but was left wondering if it includes any other highway assist features. If it's just CC + LKA/LFA, then why have something called HDA. If there's more to HDA, anyone know what other functions it has? Tnx.