A button for HOV or non-HOV
There should be a button to tell Waze whether the car is in the HOV lane. 1), it would help Waze better determine traffic speed since it wouldn't average Wazer's in the HOV lanes with the speeds of those driving slower. 2), the Map would/could show the average speed of HOV or non HOV speeds. A Wazer in the HOV lane could really impact the accurate speed average shown (and vice versa).

Great thinking! The issue you raised has been addressed in a recent redesign. Hope you like it!
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SpeedRwazer commented
A lot on time Waze tells me there is a quicker route, but it requires I use the Carpool Lane or a Carpool Only Ramp.
I can't do this when travelling Solo.
We need an Avoid Carpool Lanes/Ramps" option.
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DarkStarChuck commented
Please add a switch. This would apply to "clearing" jammed speeds for non carpool Wazers, when I go thru jammed/slow traffic @ speed in carpool lane, and help me a little when Waze is routing me.