If you are in Mexico City I recommend taking this route, 3 lanes up one direction up to the hairpin and 2 lanes back down. I had the “pleasure” of piloting a Seat Toledo loaded full of passengers of and luggage up this road.
In October 2014, Top Gear Magazine placed the Toledo on its list of “The worst cars you can buy right now.”
110hp and ~3300 lbs. The road was damp from rain, I had my kid and baby in the car, and steering feel was numb, so I was “cautious” 7/10ths driving. My definition of “cautions” is taking a 45 mph ramp at 65-70 instead of 80. The center divider creates blind corners everywhere. The posted speed was 80 kph (50 mph) for the curvy bits, I was very causally hitting 115 (71 mph) mid corner with no feedback, and half throttle to 140 (87 mph) in the straighter sections. So more speed is definitely out there if one were to try.
This is NOT my video (it’s a 2010 Accord V6). So his straight speed is faster, but his corner speed could be a lot faster. He stays in his lane way too much. With the light traffic for a left corner I would stay in the far right, apex to the far left lane, and track back out to the far right lane. From 0:17 to 24:06 he covers the above map at an average of 87 mph. (so the video is as fun as watching someone drive on a highway)
Another vid from, I think, mostly the same highway. I did see a tow truck recover a car that had went over the guardrail and down hill:
