Cortz and I have both conquered Mexico City. The smog is worse than LA . The only thing to compare it to is gas training in the Marines. The experience was horrific. My right eye closed and the left was just barely working, I finally pulled over and washed out my eyes with my drinking water and carried on. The drivers in MC are the worst. Rude, pushy, stupied and wreckless. Especially the bus and truck drivers. Even the locals will agree. Of course, all the streets are beyond crowded. I left Reno intime to pass through MC around 2pm. It did not matter. A night passage would have been impossible because the highway and street signs are not illuminated. I am now in Minatitlan, Mexico and expect to be in Costa Rica in five days.