I live right above I-80 and traffic is messed up all the time now!
I would say on average from 1pm-130pm until about 6pm it is bumper to bumper traffic moving at around 15mph!
I dont think the traffic will let up anytime soon, they are doing so much work to I-80 and the spaghetti bowl that they will probably still be working well into Sept-Oct if not lasting into next summer. I remember the last time they did any work on the spaghetti bowl it lasted 2 full summers.
I would recommend to anyone coming from the west through Reno to just get off at Mccarren either go all the way down to Pyramid Highway on Mccarren or take Mccarren to Clear Acre/Sun Valley Rd. cruise through Sun Valley and get onto Pyramid Highway out in Spanish Springs(cuts down on all the lights on Mccarren and Pyramid. Use to be very quick, but development is catching up) Once on Pyramid Highway just follow it all the way to the lake, make the turn that keeps you on the west side of the lake heading south and then you meet up with the road that goes to the Playa at that little gas station by the lake.
Pyramid Highway has a lot less little hills to, so you car/truck isnt constantly going up and down, forcing you to shift up and down, so it probably saves a little gas. The roads are straighter to, so you dont have to slow down as much for all the turns.
It sounds complicated, but in general can knock almost 20-30 minutes off a normal drive to the Playa, probably about a hour with all the construction going on. I have taken this route on every trip to the playa except for my first Burning Man( I just didnt know how crappy that road is out there) and my first year part of a theme camp (we drove out in a convoy so I had no say) I swear by it.
Last year me and my roommate(him driving his truck, me driving mine) left at the same time as 2 girls in our camp, we didnt tell them about the way we went, we got to the playa about 45 minutes before them and we were dragging trailers out there, they were in a tiny Honda.
Thats just my trick, hope it helps somebody get around all the traffic in Reno!
P.s. sorry if I misspelled Mccarren, my computer keeps saying it wrong but I thought that was how you spelled it.