Centreline Bollards/Flex Bollards

Centreline bollards, also known as vertical centreline treatment, places vertical installations on the roadway to create a centre median. This treatment gives an illusion that the roadway is narrowed and constricted, encouraging drivers to reduce their speed.

Application/Considerations/Outcomes

• Apply to two-lane local and collector streets
• Avoid areas that may block driveways or cross street access and transit services
• May be applied in conjunction with speed cushions
• May require more detailed maintenance considerations
• Fairly low-cost and easy to implement
• Can help to reduce collisions between traffic lanes due to increased separation
• Can result in decreases in 85th percentile speeds up to 5 km/hr (TAC Canadian Guide to Traffic Calming, 2017)

Image sources: Town of Newmarket, City of Greater Sudbury