Definition

Noun: A lift bridge is a type of movable bridge. Its central span can be raised vertically, like an elevator, to create an opening. This action blocks road or rail traffic on the bridge itself but allows tall boats or ships to pass through the waterway below.

Usage

The term lift bridge is used to describe the specific structure and its function. * The old lift bridge is operated by a bridge tender. * We had to wait for the lift bridge to lower before we could drive across. * The city is replacing the lift bridge with a fixed-span bridge.

Advanced Usage

• Engineering Context: In engineering and urban planning, a lift bridge is contrasted with other movable bridge types like bascule bridges (drawbridges that tilt up) or swing bridges (bridges that pivot horizontally).
  • The design called for a lift bridge due to the need for a wide, unobstructed channel.

Variants and Related Words

• Vertical-lift bridge: A more technical or formal term for the same structure, emphasizing the vertical motion.
• Movable bridge: The general category that includes lift bridges, bascule bridges, and swing bridges.
• Bascule bridge: A drawbridge that rotates on a horizontal axis, often counterbalanced.
• Swing bridge: A bridge that rotates horizontally around a central pier to open.

Synonyms

• Vertical-lift bridge (technical synonym)
• Movable bridge (general category)

Related Phrases

• To raise/lower a bridge: This is the action performed on a lift bridge.
  • They raise the lift bridge on the hour for scheduled marine traffic.
• Bridge opening: The period when the bridge span is raised, creating a gap.
  • The next bridge opening for the lift bridge is at 3 PM.

Noun

1. a bridge that can be raised to block passage or to allow boats or ships to pass beneath it