Not the highest, but perhaps much more doable than the above: Pikes Peak Highway near Colorado Springs.
Summit is 14115 feet. If you are legally allowed to enter and drive in the U.S. you can easily do this in a rental car. Try for July when it's open to the summit. When I went up in May 1995 it was open only to the 12000 foot level. The air was ...
Some while ago, I did a bit of internet research on Macusani, a town in Peru. It sits at an elevation of 4,315 m (14,157 ft). It is on the Carretera Interoceanica, a relatively new road constructed between Brazil and Peru which was completed in 2011. Its highest point is at Oquepuño Pass, about 20km southeast of Macusani. It is described on the ...
Semo La in Tibet at 5,565 is the highest surfaced road, used actively by travellers.
Semo La (Chinese: 桑木拉大坂; Standard Tibetan: བཟར་མོ་ལ) is a mountain pass situated in Coqên County, Ngari Prefecture in the central part of Tibet and gives access to the Changtang region. It is found on the so-called Northern Route, north of Raka and south of Town of Coqên in ...
The Tanggula Pass of China National Highway 109 (G109), the main road between Tibet and the rest of the China, reaches an elevation of 5,231 meters at its highest point.
The highway is fully paved and maintained, so it's passable in a regular 2WD vehicle, although winter conditions can be extreme. It's also the only road entry point normally open to ...
For paved roads accessible to ordinary rental cars, I nominate Ruta 27 in Chile, a 156 km road between San Pedro de Atacama and the Argentinian border. At its highest point it is 4,832m (15,853 feet) above sea level, and at the border crossing at Paso de Jama it is 4,320m (14,120 feet) above sea level. No guides or permits of any sort are required.
The letter determines the ambit of the road. The number is the identifier. Basically the main roads we have are (ESP):
A / AP: Highways
N: National roads
These are ordered from better to worst, but there are exceptions (i.e. you can find a new secondary road that has better pavement than a nearby national road). Anyway, in general, the ...
National road (Carretera Nacional)
Regional road (Carretera Comarcal)
see region table
The table comes from ...