It's been a long time since I resided in Denver but 6th Ave. used to suck. Way too much volume, narrow lanes, it needed upgrading back then, maybe it has been.
Shame about this accident though. Prayers for the victims, families.
Prairie
I hated that 6th Avenue exit also. You described it correctly. Haven't been up that direction in a long time. Very sad about the family. Tragic...just tragic.