Switchback

n. road or railroad following a zigzag course up a steep incline

Switchback may refer to:(primarily in American English) a road or trail joined by hairpin bends(primarily in British English) a roller coaster, or a roller coaster-like road (for the latter, see also in article on hairpin bend)a railway zig zag, or a railway with high ascents and descents"Switchback" a song by Celldweller 
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Synonyms and related words:
L, branch, cable railway, chevron, cog railway, crankiness, crookedness, dogleg, el, electric railway, elevated, elevated railway, embankment, feeder, feeder line, flexuosity, gravity-operated railway, hairpin, horse railway, junction, light railroad, line, main line, metro, monorail, rack railway, rack-and-pinion railway, rail, rail line, railroad, railway, roadbed, roadway, sidetrack, siding, street railway, streetcar line, subway, terminal, terminus, track, tram, tramline, trestle, trolley line, trunk, trunk line, tube, turnout, underground, zag, zig, zigzag, zigzaggery|
  

switchback /'switʃbæk/
danh từ đường xe lửa hình chữ chi (ở những chỗ dốc) đường xe lửa lên xuống dốc (làm trò chơi ở các công viên...)
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TRACCIATO A RAMPE. MONTAGNE RUSSE. A RAMPE. A TORNANTI. A ZIG-ZAG. FLASHBACK [CINEMA]. LAMPO ALL'INDIETRO [CINEMA]