Lakeside Drive sounds so cliche, but it just sounds so right! But if I'm going with an original name, I'd either choose "Ice Isle" for the most narrow downhill straight, or "Johnnypenso Pass" for anywhere there's a bridge, tunnel, or overpass. Then there's "Toko Throughway", "Special Route Terronium-12"/"Special Route T-12" (SR:T-12), a "Jordan's Junction", "MeanElf Lane", "kollosol* valley", "Sparkletooth Fang" (a hairpin turn), "Team CZR Boulevard", "Vagabond's Ridge", and "The Husky Straight".
Idea vomit, I know. Hopefully one gets chosen!