Issues Addressed

• Speeding (primary)
• Cut-through traffic (secondary)
  

Applications

• Collectors and local collectors.
• Straight streets with long blocks.
  

Advantages

• Discourages high speeds by forcing horizontal deflection.
  
• Reduces straight line of sight and enhances visual breaks in the street scape.
  
• Provides landscaping opportunity.
• Can accommodate emergency vehicles.
  

Disadvantages

• Removes some on-street parking.
• Inattentive drivers may not abide by the new center line,  potentially impacting oncoming traffic and bicyclists.
• Drivers can choose to speed down the center line when no vehicle is traveling in the opposite direction.

Evaluation Considerations

• Speed reduction most effective when two vehicles are traveling in opposite directions.

Design/Installation Considerations

• Must be designed carefully to discourage drivers from deviating out of the appropriate lane.
• Adequate space should be provided for pedestrians and bicyclists so that they do not  need to compete for space with vehicles.
  
• Landscaping must be designed so as not to obstruct sight lines.