The roadside ones are daylilies,
Hemerocallis fulva
Also known as Common Daylily, Tawny Daylily, Orange Daylily, Ditch Lily,
and (incorrectly) as Wild Lily, Wild Daylily, and Tiger Lily.
. Same color, no spots, grasslike leaves growing in a clump, but a mostly naked flower stem. Not really a lily at all, by the way.
The one in the OP's pic is a tiger lily.
Lilium tigrinum