Updated maps in the comments!
Hello there,
As most of the experienced Mr. Green players know, there are some mysterious roads and streets in San Andreas that slow down your vehicle by a moderate amount, the only way to reach top speed on these sections is to use nitrous oxide.
So after playing a while, I've bundled up these roads by creating a map displaying them as red lines. The template map's author is GTASAMPOYT, so most credit goes to him. I know for a fact that I missed one road in Las Venturas, the market vicinity which is right to the Strip. Plus, there may be some more roads I could have forgotten or noticed, so any criticism and help is largely appreciated.
Also, a big thanks to Zeus for helping me find some missing gaps.
Kexmeister