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headway

headway

1 6.7
Space above the road under a bridge or roof that lets tall vehicles pass
  • noun
  • /ˈhɛdˌweɪ/
  • Specialized
translation icon : altura libre
  • It would run on a 15 (preferably) or 20-minute headway throughout the day and degrade to 30 minutes after 9:00 or so.

Examples

  • Because to meet mandated headways, the transit system will be forced to do something that gives streetcars a clear advantage over buses, but is politically much harder to do.

    Blog text (16)
  • I'll ride the streetcar from Capitol Hill to Chinatown even if it takes a couple of minutes longer than the 9 & 60, and I'll be glad for the even 10-minute headways and full-time service.

    Blog text (16)
  • Also, the faster the train goes, the less capacity the line has in people per hour, as the headways between trains get larger as the speeds get higher.

    Blog text (6)
  • It's doomed to long trips, long headways, poor-to-nonexistent evening and weekend service.

    Blog text (6)
  • I loved it when MARTA operated trains on ten-minute headways.

    Blog text (34)
  • If the headways for the streetcar are comparable to the SLUT, then it's every 10 minutes during peak and 15 minutes otherwise.

    Blog text (16)
  • Raising the sales tax to 0.9% would likely allow the smaller service area to return to previous levels of service, with most routes on 30-minute headways and operating until late at night.

    Blog text (16)
  • The 140 is never crushloaded, even though Metro only runs 30 buses on it at 15-minute headways.

    Blog text (14)
  • The firefighter ensured there was enough headway between the ceiling and the ladder to work safely.

  • When installing the new sign, they checked if there was sufficient headway for people to pass underneath.

Synonyms

clearance
vsheadway
9 3.0

The height under something that lets people or vehicles pass

focuses on unobstructed space for passage rather than a safety margin
headroom
vsheadway
2 4.6

The space above your head in a room or car that lets you stand comfortably

emphasizes unobstructed vertical space for safe passage rather than comfort

Antonyms

43 4.4

A thing that blocks a passage like a pipe or artery

How High

headroom
2 4.6
headway
  • Specialized
1 6.7
clearance
9 3.0

Surface Forms

headway singular
headways plural

Morphology

headway = head + way (transparent) = head + way

The sense is a literal spatial composition meaning the space or route available for a head to pass, which is directly inferable from 'head' + 'way'.

Etymology

Headway comes from the simple parts head and way and was once used to mean the 'space for the head'. So it now names the vertical clearance under a bridge or in a tunnel that lets a vehicle pass safely.