By: Bill Baranowski, PE TRAFFIC CALMING EXAMPLES IN SUGARHOUSE, DAYBREAK, AND WEST JORDAN CITY

Transcription

1 By: Bill Baranowski, PE TRAFFIC CALMING EXAMPLES IN SUGARHOUSE, DAYBREAK, AND WEST JORDAN CITY

2 1977 HIGHLAND RUGBY TOUR

3 1945 WHERE??? What is more contentious than traffic calming?

4 1951 LOOKING SOUTHEAST Who is older than 63?

5 WEST JORDAN CITY

6 PROPOSED GATED COMMUNITY

7 PRESENTATION OUTLINE Neighborhood Street Design Traffic Calming Principles Sugarhouse Street Plan Traffic Calming Examples on Residential Streets Road Diets in Salt Lake and Provo

8 WHY TRAFFIC CALMING? Most pedestrian fatalities occur in urban areas (73%) at non intersection locations (77%) in normal weather conditions (90%) and at night (67%). (NHTSA, 2007) A five year study found that children with speed humps in their neighborhoods had 50% lower odds of being hurt or injured in a vehicle accident. (American Journal of Public Health, 2004) A study conducted in Portland, OR found that streets with traffic calming experienced a 39% decrease in crash frequency. (2008)

9 RISK OF DEATH VS. SPEED UK STUDY 85% 45% 15% 20 mph 30 mph 40 mph

10 RISK OF DEATH VS. SPEED - USA STUDY

11 STREET WIDTH

12 IMPROVEMENTS

13 ACCIDENTS VS. WIDTH - LONGMONT, CO Neighborhood Collector St. Local Residential St.

14

15 BLOCK LENGTH SAN ANTONIO, TX

16 SUGARHOUSE STREETS SLC, UT

17 STREET NETWORK DESIGN

18 CONNECTIVITY

19

20

21 WHAT IS TRAFFIC CALMING? Traffic Calming is a term used to describe various methods of altering motorists behavior to be more appropriate with the area in which they are traveling.

22 TRAFFIC CALMING OBJECTIVES Encourage safe vehicle speeds Reduce crashes Increase the safety and the perception of safety for pedestrians Reduce the need for police enforcement Enhance the street environment Increase access for all modes of transportation Reduce cut-through traffic

23 LOCAL RESIDENTIAL STREETS Local Streets in West Jordan City include curb and gutter, parkstrip, 25-ft. of asphalt, and 5-ft. sidewalks. Posted speed is always 25 MPH.

24 NEIGHBORHOOD COLLECTOR STREETS Neighborhood Collector

25 SPEED HUMPS Speed humps are the most common form of traffic calming requested. Their low cost, simple construction, and effectiveness in lowering speeds make them an attractive option. However, speed humps can be a controversial strategy to implement. While they have been proven effective in reducing speeds along some streets on which they are placed, they may divert traffic to previously quiet streets, thus creating the need for even more traffic calming!

26 PROJECT PRIORITIES 1) Complaints 2) Speed Problems 3) 800+ vehicles/day required 4) Schools 5) Playground 6) Issues

27 COPPERWOOD DR. Neighborhood Collector Street. Elementary School. Arterial to Arterial short cut.

28 JORDAN VILLAGE ROAD (BY DAVID B S OLD PLACE)

29 NO PASSING ZONE? (35 PAVEMENT BEFORE BUMPS)

30 JORDAN VILLAGE ROAD

31 JORDAN VILLAGE ROAD

32 PINE CROSSING DRIVE

33 PINE CROSSING DRIVE

34 WILD ACRES DRIVE ADD EDGE LINES

35 GOLD MEDAL DRIVE

36 DATA: BEFORE AND AFTER TRAFFIC VOLUME: Reduction in the volume of traffic traveling through residential areas. 85 th % SPEEDS: at or below posted speed limit. VIOLATION RATE: Reduction of speeds above the posted speed limit reduce to a 15% violation rate (VR) or less.

37 BEFORE AND AFTER DATA Before After Project Year Volume 85 th % Speed Violation Rate Devices Volume 85 th % Speed Violation Rate Jordan Village Road Wild Acres Drive , Speed Tables Speed Tables TBD TBD TBD Pine Crossing Drive Gold Medal Drive 2980 West , Speed Tables , Speed Tables Bike Lanes TBD TBD TBD TBD TBD TBD TBD TBD TBD

38 NEW SUBDIVISIONS: NAYLOR FARMS

39 DAYBREAK LOCAL STREETS Traffic Calming Narrow Streets Small lots Short blocks Intersection treatments

40 DAYBREAK LOCAL STREETS PLAN

41 35 Collector Street Local Street NEIGHBORHOOD COLLECTOR DESIGN <--- Neighborhood Collector

42 SPEED HUMPS/SPEED TABLES Spacing: Not less than 300 feet apart, No more than 500 feet apart. Traffic Calming: State of the Practice, ITE and FHWA. Materials Cost: Concrete is $3,300 each. Asphalt is $2,200 each.

43 QUIZ: TRAFFIC CALMING?? All-way stops Speed limits/enforcement Markings to narrow lanes Roadside environment

44 WHAT ABOUT STOP SIGNS? While it may seem intuitive that putting in more stop signs would help reduce speeds, studies of installation of stop signs in neighborhoods have shown that they have little effect on vehicle speeds. Furthermore, the installation of unwarranted stop signs increases the likelihood of motorists disregarding stop signs at that location and in other locations around the City. It can also result in increased speeds between the stop signs as motorists try to make up for lost time. Unlike stop signs, traffic-calming devices such as speed tables been shown to decrease vehicle speeds, decrease accidents, and reduce traffic volumes without stopping traffic. Specific "warrants" for volume and other factors must be met before installing a stop sign will be considered.

45 SPEED ENFORCEMENT

46 RIVERDALE, UTAH: COLLECTOR STREET

47 CURB EXTENSIONS Each corner has an extended crosswalk. Distance to cross is shorter Mid-block flare used to improve visibility of midblock crossing

48 BULB OUTS Advantages: Visual traffic calming effects and point speed reductions. Highlights intersections for motorists. Reduces length of crossings for pedestrians. Provides opportunities for landscaping. No adverse effect on emergency vehicle access. Disadvantages: Storm drain, street lighting, sewer, and other utilities may be affected. Forces bicyclists into the travel lane with motorized vehicles.

49 BULB OUTS ASHEVILLE, NC

50 MID-BLOCK BULBS ASHEVILLE, NC

51 BIKE LANE STRIPING/NARROWING Description: Striping is used to create narrow, 10-foot wide lanes. This gives drivers the feel of a narrow street that does not lend itself to high speeds. Advantages: Easily implemented. (Cheap!) The striping can be easily modified if paint is used. Speed may decrease and safety is improved through the provision of positive guidance to drivers. Disadvantages: Increases regular maintenance. Residents do not always perceive striping as an effective tool for speed reduction.

52 HUMPS, BULBS & STRIPING

53 RAISED INTERSECTIONS RED COLOR

54 ON-STREET PARKING

55 CENTER ISLANDS

56 RESIDENTIAL NEIGHBORHOOD GATEWAYS Residential neighborhood gateway treatments convert the undistinguished entrances of residential areas into welldefined gateways which alert the driver that they are entering a special place. Gateways can be implemented by means of an entry structure or signing or other aesthetic features that emphasize the residential neighborhood.

57 A BREAK FOR PEDESTRIANS

58 ROUNDABOUTS West Jordan - City Hall, UT Main Street St. George, UT

59 THE ROAD DIET CONCEPT

60 BEFORE AND AFTER EXAMPLES 900 EAST/900 SOUTH, SALT LAKE CITY, UT 12,000 ADT, Completed in 2007

61 900 SOUTH BEFORE EASTBOUND

62 900 SOUTH BEFORE EASTBOUND

63 900 EAST/900 SOUTH - PARKING

64 900 EAST - NORTHBOUND

65 1300 EAST PEDESTRIAN FATALITY

66 1300 EAST EXISTING/PROPOSED 17,710 ADT 35 MPH Reduce to 30 MPH Feedback Speed Signs (3 sets) Ped actuated flashers at 4 existing mid-block crossings.

67 CENTER STREET PROVO, UT 9,000 ADT, Completed in 2004

68 CENTER STREET PROVO, UT 9,000 ADT, Completed in 2004

69 900 EAST/2200 NORTH PROVO, UT

70 900 EAST/TEMPLE VIEW DR. PROVO, UT

71 FOURTH PLAIN BOULEVARD, VANCOUVER, WA. 17,000 ADT, Completed in 2002 Courtesy of Jennifer Rosales and Todd Boulanger.

72 FOURTH PLAIN BOULEVARD, VANCOUVER, WA. 52% reduction in crashes 18% reduction in speed No traffic diversion Courtesy of Jennifer Rosales and Todd Boulanger.

73 BEFORE AND AFTER EXAMPLES BAXTER STREET, ATHENS, GA. 20,000 ADT 53-60% reduction in crashes Reduction in speed 4% traffic diversion Courtesy of Jennifer Rosales and David Clark.

74 Courtesy of Dan Burden

75 TYPICAL 4-LANE SECTION Before: Courtesy of Michael Ronkin, Oregon DOT.

76 PEDESTRIAN BENEFITS Reduces crossing distance Eliminate or reduce multiple threat crash types Allows refuge medians or crossing island to break a crossing into 2 simpler crossings Reduce travel speeds Increase sidewalk buffer from travel lanes (parking or bike lane)

77 Courtesy of Michael Ronkin, Oregon DOT

78 WEST JORDAN WEST OF BANGERTER ROUND GRID

79 ¼ mile GRID SYSTEM COLLECTOR STREETS ¼ mile

80 COLLECTOR/COLLECTOR INTERSECTIONS Instead of Traffic Signals or 4-Way Stops.

81 COLLECTOR/LOCAL RBT

82 COMPACT URBAN ROUNDABOUT Germany

83 ROUNDABOUT EXAMPLE CHARLOTTE,NC

84 PIEDMONT TOWN CENTER