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

1977 HIGHLAND RUGBY TOUR

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

1951 LOOKING SOUTHEAST Who is older than 63?

WEST JORDAN CITY

PROPOSED GATED COMMUNITY

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

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)

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

RISK OF DEATH VS. SPEED - USA STUDY

STREET WIDTH

IMPROVEMENTS

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

BLOCK LENGTH SAN ANTONIO, TX

SUGARHOUSE STREETS SLC, UT

STREET NETWORK DESIGN

CONNECTIVITY

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.

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

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.

NEIGHBORHOOD COLLECTOR STREETS Neighborhood Collector

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!

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

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

JORDAN VILLAGE ROAD (BY DAVID B S OLD PLACE)

NO PASSING ZONE? (35 PAVEMENT BEFORE BUMPS)

JORDAN VILLAGE ROAD

PINE CROSSING DRIVE

WILD ACRES DRIVE ADD EDGE LINES

GOLD MEDAL DRIVE

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.

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 2006 1,393 28.5 20.0 3 Speed Tables 2007 865 29.5 46.2 5 Speed Tables TBD TBD TBD 410 24.2 10.8 Pine Crossing Drive Gold Medal Drive 2980 West 2008 1,710 33.8 26.7 3 Speed Tables 2008 1,408 31.8 26.7 4 Speed Tables 2008 745 22.4 5.4 Bike Lanes TBD TBD TBD TBD TBD TBD TBD TBD TBD

NEW SUBDIVISIONS: NAYLOR FARMS

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

DAYBREAK LOCAL STREETS PLAN

35 Collector Street Local Street NEIGHBORHOOD COLLECTOR DESIGN 55 25 <--- Neighborhood Collector

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.

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

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.

SPEED ENFORCEMENT

RIVERDALE, UTAH: COLLECTOR STREET

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

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.

BULB OUTS ASHEVILLE, NC

MID-BLOCK BULBS ASHEVILLE, NC

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.

HUMPS, BULBS & STRIPING

RAISED INTERSECTIONS RED COLOR

ON-STREET PARKING

CENTER ISLANDS

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.

A BREAK FOR PEDESTRIANS

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

THE ROAD DIET CONCEPT

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

900 SOUTH BEFORE EASTBOUND

900 EAST/900 SOUTH - PARKING

900 EAST - NORTHBOUND

1300 EAST PEDESTRIAN FATALITY

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.

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

900 EAST/2200 NORTH PROVO, UT

900 EAST/TEMPLE VIEW DR. PROVO, UT

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

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

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.

Courtesy of Dan Burden

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

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)

Courtesy of Michael Ronkin, Oregon DOT

WEST JORDAN WEST OF BANGERTER ROUND GRID

¼ mile GRID SYSTEM COLLECTOR STREETS ¼ mile

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

COLLECTOR/LOCAL RBT

COMPACT URBAN ROUNDABOUT Germany

ROUNDABOUT EXAMPLE CHARLOTTE,NC

PIEDMONT TOWN CENTER