In areas with parallel, optional toll/express lanes like Northern VA -
At EACH HOT(High Occupancy Toll)/Express lane entry point tell me how much time I will save by choosing the toll lane, even if that time is 0 or negative.
Ex. "Approaching entrance to a parallel Toll lane, at this time entering the toll lane is estimated to be 30 min faster than the regular lanes"
Ex. "Approaching entrance to a parallel Toll lane, at this time there is no time benefit to entering the toll lane."

Currently I think maybe Waze is suggesting I pay the $15 toll to save 2min. Or, I think maybe I should take the toll lane just to be safe in case Waze didn't re-calculate for traffic backing up in the free lanes (this happened recently - I was not directed to enter the toll lane, then had a 10min delay in the normal lanes due to an accident backup that had obviously been there since long before I passed the toll entry point).