Passive regen??

[jimeneztrans84]

Forgot to mention my truck does self regen going down the road almost every day. I do roundtrip of 500 miles 3 or 4 times a week. Sometimes I'll get off the highway and rpm will be at 7k and hest light comes on. Only 1 time since I've owned the truck 2011 kw t660 cm2250 has it asked for parked regen. It's been about 150k miles that I've put on engine. Just wanting to know if these self regens are normal and how often? Thanks