04/22/23 1

Traffic Calming Devices Traffic Calming Devices WorkshopWorkshop

Prepared byCity Engineering Department

04/22/23 2

Project GoalsProject Goals

Purpose of workshop Types of TDCs Available Considerations Recommendations and Analysis Informational Items NE 8th & 10th Avenues Considerations Discussion Review existing City policy

04/22/23 3

Purpose of WorkshopPurpose of Workshop

Discuss the different types of TDCs available and their applicability for use throughout the City

Solicit input of preferences from the community and the Commission

Discuss and comments

04/22/23 4

Types of TDCs AvailableTypes of TDCs Available

Passive Controls–Warning signs– Speed limit signs– Caution signs– Speed radar signs– Radar boards– Police speed enforcement

04/22/23 5

Types of TDCs AvailableTypes of TDCs Available Active Controls - Vertical or horizontal deflections

– Speed bumps– Speed humps– Speed pillows– Speed tables– Raised intersections– Intersection islands– Roundabouts– Splitter islands– Narrowed lanes– Lane offsets

04/22/23 6

ConsiderationsConsiderations Impact to neighborhoods Thru traffic Emergency vehicles response times Fire rescue response times Garbage truck pickup Delivery vehicles Pedestrian safety Aesthetics Cost of implementation and maintenance Transfer of problems to other areas Noise impacts due to stopping and accelerating

04/22/23 7

Recommendation and AnalysisRecommendation and Analysis Discussion of the

following- Passive Controls- Active Controls - Vertical or horizontal deflections– Speed bumps– Speed humps– Speed pillows– Speed tables– Raised intersections

– Intersection islands– Roundabouts– Splitter islands– Narrowed lanes– Lane offsets

04/22/23 8

Passive ControlsPassive Controls

04/22/23 9

Speed bumps & humpsSpeed bumps & humps

04/22/23 10

Speed pillowsSpeed pillows

04/22/23 11

Speed tablesSpeed tables

04/22/23 12

Raised intersectionsRaised intersections

04/22/23 13

Intersection islandsIntersection islands

04/22/23 14

RoundaboutsRoundabouts

04/22/23 15

Splitter islandsSplitter islands

04/22/23 16

Narrowed lanesNarrowed lanes

04/22/23 17

Lane offsetsLane offsets

04/22/23 18

Informational ItemsInformational ItemsPresent TDCs being installed

- Speed Tables per BCTD StandardCoordination with Fire and Police

- Emergency response impactsMajority of installs based on

residents requestTDCs have a positive impact on

crime prevention

04/22/23 19

NE 8NE 8thth and NE 10 and NE 10thth Avenues Avenues ConsiderationsConsiderationsOptions to conversion from one way

to two way traffic- Install speed tables on each avenue to

slow traffic- Eliminate the NB thru movement from the

10th Ave. signal to reduce cut thru traffic- Eliminate the SB and NB left turns at 8th

Ave. leaving only the WB left for Sage plaza or eliminate the signal all together

04/22/23 20

DiscussionDiscussion

Discussion of presentation and input from residents and Commission

04/22/23 21

Review Existing City PolicyReview Existing City Policy

Review of existing policy for potential changes