Trestle :  (noun)
1: a supporting tower used to support a bridge
2: sawhorses used in pairs to support a horizontal tabletop

L, branch, buck, cable railway, clotheshorse, cog railway, el, electric railway, elevated, elevated railway, embankment, feeder, feeder line, gravity-operated railway, horse, horse railway, junction, light railroad, line, main line, metro, monorail, rack railway, rack-and-pinion railway, rail, rail line, railroad, railway, roadbed, roadway, sawbuck, sawhorse, sidetrack, siding, street railway, streetcar line, subway, switchback, terminal, terminus, track, tram, tramline, trestle and table, trestle board, trestle table, trestlework, trestling, trolley line, trunk, trunk line, tube, turnout, underground, workhorse,