Device name(s): Diagonal Diverters/Diverters/Diagonal Street Closures

Diagonal Diverters

Approximate Cost:$50,000 – $75,000

Definition: A diagonal diverter is either a raised median, bollards, and/or another type of treatment placed diagonally across an intersection to restrict through traffic movements.  Diagonal diverters split a four-way intersection into two L-shaped turns.   Bicycle and pedestrian access may be maintained  by providing breaks in the treatment.  The purpose of a diagonal diverter is to reduce traffic volumes along a roadway and divert traffic to adjacent streets. The use of the inverters interrupt traffic flow on a street reducing or eliminating through traffic, but maintains traffic circulation. Diverters are barriers placed across four–legged intersections, interrupting through traffic flow. These barriers can be used to create a maze–like effect in the neighborhood.

Fast Facts:

  • Can be used on Local Street- yes
  • Can be used on Collector- possible
  • Can be used on Arterial- no
  • Reduces Speed- possible
  • Reduces Volume-  yes
  • Noise Impact- no
  • Restricts Access- yes
  • Bicyclist Impact- possible
  • Transit Impact- yes
  • Parking Impact- no
  • Emergency Response Impact- yes


  • reduces cut-through traffic
  • bicycle and pedestrian access may be maintained
  • eliminates through traffic
  • provide areas for landscaping
  • reduces traffic conflict point
  • increases pedestrian safety
  • can include bicycle path connection


  • impacts access
  • increases trip lengths
  • increases traffic to adjacent streets
  • may inconvenience residents trying to access their property
  • may inhibit access by emergency vehicles
  • may divert through traffic to other local street
  • increases response time for emergency vehicles
  • vehicle can turn it higher speeds because there is no opposing traffic


  • The purpose of this type of closure is to force traffic back onto the arterial roads around the neighborhood.

Diagonal Diverters