double-deck

[ duhb-uh l-dek ]

/ ˈdʌb əlˈdɛk /

Also dou·ble-decked. having two decks, tiers, or levels: a double-deck bunk; a double-deck bus.

to add a second deck to (a bridge) or a second level to (a road).

Origin of double-deck

An Americanism dating back to 1865–70

Double-deck bunks lined each of the side walls, divided by a narrow aisle.

The Lone Ranger Rides |Fran Striker
The street car system is good, cars being of the double-deck type.

Seven Legs Across the Seas |Samuel Murray
With double-deck cars as feeders, it seems to offer the cheapest, most convenient, and safest means of rapid transit.

Charities and the Commons: The Pittsburgh Survey, Part II: The Place |Various
The double-deck construction extended for 360 the full length of the original pier.

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 |George C. Clarke

Now it was triple its former size, rebuilt and modernized, with many bedrooms, a double-deck piazza and a dancing floor.

Ainslee's, Vol. 15, No. 6, July 1905 |Various