Not possible with my employer. 10am is the latest I am allowed to arrive. And to be honest, I already hated being in office at 8pm some times, so being out from work at 3/4pm is also a plus in my book.
Probably depends on where you live/work. My experience is that the roads go from empty to busy around 6:30 and start to get seriously clogged around 7:15. They're worst 8:15 - 9:30, but 11-2:30 is pretty similar to 7:45, partly because of double-parked trucks everywhere.