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Director's Office
Municipal Plaza Building
114 W. Commerce
San Antonio, Texas 78205
Main Line: (210) 207-8022
Fax: (210) 207-4406

Curb Extensions: Chicanes

Chicanes are mid-block curb extensions that alternate from one side of the street to the other, forming S-shaped curves. This measure should be only used on residential roadways with less than 500 vehicles per day if reducing the street width to only one lane.



  • Narrows the roadway which may cause motorists to reduce their operating speeds and may reduce volume
  • Reduces impervious cover and has a positive environmental impact


  • Curb realignment and landscaping may be costly
  • Some on-street parking may be eliminated
  • Bicyclists may briefly have to merge with vehicular traffic
  • Local street drainage may be impacted

Eligibility Considerations

  • Residential street with a lawful speed limit of 30 mph
  • Operating speeds of 35 mph or greater
  • No more than one travel lane in each direction
  • Signs and vegetation must conform to the Clear Vision Area ordinance
  • Neighborhood Association Landscape Maintenance Agreement required if landscaping is included


Reduced Speed One Star   Reduced Volume No Star
Enhanced Safety One Star   Maintenance Three Star

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