Roundabout General Talking Points General Why Is the Wisconsin Department of Transportation Building More Roundabouts?
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Roundabout Planning, Design, and Operations Manual
Roundabout Planning, Design, and Operations Manual December 2015 Alabama Department of Transportation ROUNDABOUT PLANNING, DESIGN, AND OPERATIONS MANUAL December 2015 Prepared by: The University Transportation Center for of Alabama Steven L. Jones, Ph.D. Abdulai Abdul Majeed Steering Committee Tim Barnett, P.E., ALDOT Office of Safety Operations Stuart Manson, P.E., ALDOT Office of Safety Operations Sonya Baker, ALDOT Office of Safety Operations Stacey Glass, P.E., ALDOT Maintenance Stan Biddick, ALDOT Design Bryan Fair, ALDOT Planning Steve Walker, P.E., ALDOT R.O.W. Vince Calametti, P.E., ALDOT 9th Division James Brown, P.E., ALDOT 2nd Division James Foster, P.E., Mobile County Clint Andrews, Federal Highway Administration Blair Perry, P.E., Gresham Smith & Partners Howard McCulloch, P.E., NE Roundabouts DISCLAIMER This manual provides guidelines and recommended practices for planning and designing roundabouts in the State of Alabama. This manual cannot address or anticipate all possible field conditions that will affect a roundabout design. It remains the ultimate responsibility of the design engineer to ensure that a design is appropriate for prevailing traffic and field conditions. TABLE OF CONTENTS 1. Introduction 1.1. Purpose ...................................................................................................... 1-5 1.2. Scope and Organization ............................................................................... 1-7 1.3. Limitations ................................................................................................... -
Module 6. Hov Treatments
Manual TABLE OF CONTENTS Module 6. TABLE OF CONTENTS MODULE 6. HOV TREATMENTS TABLE OF CONTENTS 6.1 INTRODUCTION ............................................ 6-5 TREATMENTS ..................................................... 6-6 MODULE OBJECTIVES ............................................. 6-6 MODULE SCOPE ................................................... 6-7 6.2 DESIGN PROCESS .......................................... 6-7 IDENTIFY PROBLEMS/NEEDS ....................................... 6-7 IDENTIFICATION OF PARTNERS .................................... 6-8 CONSENSUS BUILDING ........................................... 6-10 ESTABLISH GOALS AND OBJECTIVES ............................... 6-10 ESTABLISH PERFORMANCE CRITERIA / MOES ....................... 6-10 DEFINE FUNCTIONAL REQUIREMENTS ............................. 6-11 IDENTIFY AND SCREEN TECHNOLOGY ............................. 6-11 System Planning ................................................. 6-13 IMPLEMENTATION ............................................... 6-15 EVALUATION .................................................... 6-16 6.3 TECHNIQUES AND TECHNOLOGIES .................. 6-18 HOV FACILITIES ................................................. 6-18 Operational Considerations ......................................... 6-18 HOV Roadway Operations ...................................... 6-20 Operating Efficiency .......................................... 6-20 Considerations for 2+ Versus 3+ Occupancy Requirement ............. 6-20 Hours of Operations .......................................... -
City Maintained Street Inventory
City Maintained Streets Inventory DATE APPROX. AVG. STREET NAME ACCEPTED BEGINNING AT ENDING AT LENGTH WIDTH ACADEMYText0: ST Text6: HENDERSONVLText8: RD BROOKSHIREText10: ST T0.13 Tex20 ACADEMYText0: ST EXT Text6: FERNText8: ST MARIETTAText10: ST T0.06 Tex17 ACTONText0: WOODS RD Text6:9/1/1994 ACTONText8: CIRCLE DEADText10: END T0.24 Tex19 ADAMSText0: HILL RD Text6: BINGHAMText8: RD LOUISANAText10: AVE T0.17 Tex18 ADAMSText0: ST Text6: BARTLETText8: ST CHOCTAWText10: ST T0.16 Tex27 ADAMSWOODText0: RD Text6: CARIBOUText8: RD ENDText10: OF PAVEMENT T0.16 Tex26 AIKENText0: ALLEY Text6: TACOMAText8: CIR WESTOVERText10: ALLEY T0.05 Tex12 ALABAMAText0: AVE Text6: HANOVERText8: ST SWANNANOAText10: AVE T0.33 Tex24 ALBEMARLEText0: PL Text6: BAIRDText8: ST ENDText10: MAINT T0.09 Tex18 ALBEMARLEText0: RD Text6: BAIRDText8: ST ORCHARDText10: RD T0.2 Tex20 ALCLAREText0: CT Text6: ENDText8: C&G ENDText10: PVMT T0.06 Tex22 ALCLAREText0: DR Text6: CHANGEText8: IN WIDTH ENDText10: C&G T0.17 Tex18 ALCLAREText0: DR Text6: SAREVAText8: AVE CHANGEText10: IN WIDTH T0.18 Tex26 ALEXANDERText0: DR Text6: ARDIMONText8: PK WINDSWEPTText10: DR T0.37 Tex24 ALEXANDERText0: DR Text6: MARTINText8: LUTHER KING WEAVERText10: ST T0.02 Tex33 ALEXANDERText0: DR Text6: CURVEText8: ST ARDMIONText10: PK T0.42 Tex24 ALLENText0: AVE 0Text6:/18/1988 U.S.Text8: 25 ENDText10: PAV'T T0.23 Tex19 ALLENText0: ST Text6: STATEText8: ST HAYWOODText10: RD T0.19 Tex23 ALLESARNText0: RD Text6: ELKWOODText8: AVE ENDText10: PVMT T0.11 Tex22 ALLIANCEText0: CT 4Text6:/14/2009 RIDGEFIELDText8: -
Pavements and Surface Materials
N O N P O I N T E D U C A T I O N F O R M U N I C I P A L O F F I C I A L S TECHNICAL PAPER NUMBER 8 Pavements and Surface Materials By Jim Gibbons, UConn Extension Land Use Educator, 1999 Introduction Traffic Class Type of Road Pavements are composite materials that bear the weight of 1 Parking Lots, Driveways, Rural pedestrian and vehicular loads. Pavement thickness, width and Roads type should vary based on the intended function of the paved area. 2 Residential Streets 3 Collector Roads Pavement Thickness 4 Arterial roads 5 Freeways, Expressways, Interstates Pavement thickness is determined by four factors: environment, traffic, base characteristics and the pavement material used. Based on the above classes, pavement thickness ranges from 3" for a Class 1 parking lot, to 10" or more for Class 5 freeways. Environmental factors such as moisture and temperature significantly affect pavement. For example, as soil moisture Sub grade strength has the greatest effect in determining increases the load bearing capacity of the soil decreases and the pavement thickness. As a general rule, weaker sub grades require soil can heave and swell. Temperature also effects the load thicker asphalt layers to adequately bear different loads associated bearing capacity of pavements. When the moisture in pavement with different uses. The bearing capacity and permeability of the freezes and thaws, it creates stress leading to pavement heaving. sub grade influences total pavement thickness. There are actually The detrimental effects of moisture can be reduced or eliminated two or three separate layers or courses below the paved wearing by: keeping it from entering the pavement base, removing it before surface including: the sub grade, sub base and base. -
Brick Streets Plan
BRICK STREETS PLAN City of Rock Island Community & Economic Development Department Planning & Redevelopment Division Rock Island Preservation Commission Adopted 1988 by Rock Island City Council Amended: January 23, 2012 August 22, 2011 March 28, 2005 April 10, 2000 May 12, 1997 September 14, 1992 Rock Solid. Rock Island. 1899 - The first brick pavement was laid in the Tri-Cities on the corner of Twentieth Street and Second Avenue, Rock Island. The first brick was placed by Mayor William McConochie. Civil Engineer for the project was H.G. Paddock. -- From Historical Souvenir of Moline and Vicinity, 1909 TABLE of CONTENTS Executive Summary ..................................................................................... 3 Prioritization List ........................................................................................... 5 Map of Brick Streets ..................................................................................... 6 Methodology ................................................................................................ 9 History of Brick Street Construction in Rock Island ...................................... 10 Condition of Brick Streets ............................................................................. 13 Utilities and Brick Streets ............................................................................. 17 Street Standards .......................................................................................... 18 Owner-Occupancy Along Brick Streets ....................................................... -
Access Management Manual, September 5, 2019 TABLE of CONTENTS
AccessAccess ManagementManagement ManualManual T E X A S Prepared by the City of Irving Public Works/Traffic and Transportation Department Adopted September 5, 2019 Access Management Manual, September 5, 2019 TABLE OF CONTENTS Section 1 Introduction Page 1.0 Purpose 1 1.1 Scope 1 1.2 Definitions 3 1.3 Authority 10 Section 2 Principles of Access Management 2.1 Relationship between Access and Mobility 11 2.2 Integration of Land Use and Transportation 11 2.3 Relationship between Access and Roadway Efficiency 12 2.4 Relationship between Access and Traffic Safety 12 Section 3 Access Management Programs and Policies 3.1 Identifying Functional Hierarchy of Roadways 14 3.1.1 Sub-Classifications of Roadways 14 3.1.1.1 Revising the “Master Thoroughfare Plan” 15 3.1.2 Comprehensive Plan 15 3.1.3 Discretionary Treatment by the Director 15 3.2 Land Use 15 3.3 Unified Access Planning Policy 16 3.4 Granting Access 16 3.4.1 General Mutual Access 17 3.4.2 Expiration of Access Permission 17 3.4.3 “Grandfathered” Access and Non-Conforming Access 17 3.4.4 Illegal Access 19 3.4.4.1 Stealth Connection 19 3.4.5 Temporary Access 19 3.4.6 Emergency Access 19 3.4.7 Abandoned Access 20 3.4.8 Field Access 20 3.4.9 Provision for Special Case Access 20 3.4.10 Appeals, Variances and Administrative Remedies 20 3.5 Parking and Access Policy 20 3.6 Access vs Accessibility 21 3.7 Precedence of Access Rights Policy 21 3.8 Right to Access A Specific Roadway 22 3.9 Traffic Impact Analyses (TIA’s) 22 3.9.1 Level of Service (LOS) 22 3.9.2 Traffic Impact Analysis (TIA) Requirements -
Town Standards Index (Select to View) • Collector Street Cross Section
Town Standards Index (select to view) • Collector Street Cross Section - Standard #3.00 • Collector Street Cross Section w/ Bike Lanes - Standard #3.01 • Local Street Cross Section - Standard #3.02 • Local Street Cross Section (No Curb) - Standard #3.03 • Industrial Street Cross Section - Standard #3.04 • 4-Lane Divided Street Cross Section - Standard #3.05 • Alley Cross Section - Standard #3.06 • Greenway Asphalt Path Cross Section - Standard #3.07 • Utility Trench Pavement Repair - Standard #3.08 • Typical Pavement Repair - Standard #3.09 • Standard Driveway Turnout - Standard #3.12 • Standard Curb & Gutter - Standard #3.13 • Median Curb - Standard #3.14 • Rolled Curb - Standard #3.15 • Residential Cul-de-sac - Standard #3.16 • Barricade for Dead End Streets - Standard #3.17 • Standard Concrete Drop Inlet - Standard #4.10 • Standard Brick Drop Inlet - Standard #4.11 • Standard Drop Inlet Grates - Standard #4.12 • Standard Concrete Catch Basin - Standard #4.13A • Standard Concrete Catch Basin - Standard #4.13B • Standard Brick Catch Basin - Standard #4.14A • Standard Brick Catch Basin - Standard #4.14B • HDPE Pipe - Standard #4.16 • Trench Installation for HDPE - Standard #4.16A • Polypropylene Pipe - Standard #4.17 • Trench Installation for Polypropylene - Standard #4.17A • Dissimilar Pipe Connections to RCP - Standard #4.18 • Curb Ramps - Standard #5.00 • Curb Ramps - New Development - Standard #5.01 • Curb Ramps - New Development - Standard #5.02 • Curb Ramps - New Development - Standard #5.03 • Curb Ramps - Retrofit - Standard #5.04 -
Evaluation of Concrete Pavements with Tied Shoulders Or Widened Lanes Bert E
39 19. K. Y. Kung. A New Method in Correlation Study of vision of Pavements. Proc., 3rd International Con Pavement Deflection and Cracking. Proc., 2nd In ference on Structural Design of Asphalt Pavements, ternational Conference on Structural Design of 1972, pp. 1188-1205. Asphalt Pavements, 1967, pp. 1037-1046. 20. P. H. Leger and P. Autret. The Use of Deflection Publication of this paper sponsored by Committee on Pavement Condi Measurements for the Structural Design and Super- tion Evaluation. Evaluation of Concrete Pavements With Tied Shoulders or Widened Lanes Bert E. Colley, Claire G. Ball, and Pichet Arriyavat, Portland Cement Association Field and laboratory pavements were instrumented and load tested to reducing pavement performance, Because of this prob evaluate the effect of widened lanes, concrete shoulders, and slab thick lem, several states have installed costly longitudinal ness on measured strains and deflectfons. Eight slabs were tested in the and transverse drainage systems. Thus, concrete field and two in the laboratory. Pavement slabs were 203, 229, or 254 shoulders and widened lanes have the potential for curing mm (8, 9, or 10 in) thick. Other major design variables included the width of lane widening, the presence or absence of dowels or of a con many drainage problems as well as providing additional crete shoulder, joint spacing, and the type of shoulder joint construc slab strength. tion. Generally, there was good agreement between measured strains and Many design features contribute to pavement life. values calculated by using Westergaard's theoretical equations. Concrete The effect of some of these features can be evaluated shoulders were effective in reducing the magnitude of measured strains analytically. -
A Guide for HOT Lane Development FHWA
U.S. Department of Transportation Federal Highway Administration A Guide for HOT LANE DEVELOPMENT A Guide for HOT LANE DEVELOPMENT BY WITH IN PARTNERSHIP WITH U.S. Department of Transportation Federal Highway Administration PRINCIPAL AUTHORS Benjamin G. Perez, AICP PB CONSULT Gian-Claudia Sciara, AICP PARSONS BRINCKERHOFF WITH CONTRIBUTIONS FROM T. Brent Baker Stephanie MacLachlin PB CONSULT PB CONSULT Kiran Bhatt Carol C. Martsolf KT ANALYTICS PARSONS BRINCKERHOFF James S. Bourgart Hameed Merchant PARSONS BRINCKERHOFF HOUSTON METRO James R. Brown John Muscatell PARSONS BRINCKERHOFF COLORADO DEPARTMENT OF TRANSPORTATION Ginger Daniels John O’Laughlin TEXAS TRANSPORTATION INSTITUTE PARSONS BRINCKERHOFF Heather Dugan Bruce Podwal COLORADO DEPARTMENT OF TRANSPORTATION PARSONS BRINCKERHOFF Charles Fuhs Robert Poole PARSONS BRINCKERHOFF REASON PUBLIC POLICY INSTITUTE Ira J. Hirschman David Pope PB CONSULT PARSONS BRINCKERHOFF David Kaplan Al Schaufler SAN DIEGO ASSOCIATION OF GOVERNMENTS PARSONS BRINCKERHOFF Hal Kassoff Peter Samuel PARSONS BRINCKERHOFF TOLL ROADS NEWSLETTER Kim Kawada William Stockton SAN DIEGO ASSOCIATION OF GOVERNMENTS TEXAS TRANSPORTATION INSTITUTE Tim Kelly Myron Swisher HOUSTON METRO COLORADO DEPARTMENT OF TRANSPORTATION Stephen Lockwood Sally Wegmann PB CONSULT TEXAS DEPARTMENT OF TRANSPORTATION Chapter 1 Hot Lane Concept And Rationale........................................................................2 1.1 HOT lanes Defined .................................................................................................2 -
What Are the Advantages of Roundabouts?
What is a roundabout? A roundabout is an intersection where traffic travels around a Circulatory central island in a counter- Truck Apron Roadway clockwise direction. Vehicles entering or exiting the roundabout must yield to vehicles, bicyclists, and pedestrians. Figure 1 presents the elements of a roundabout. Yield Line Splitter Island Figure 1: Elements of a Roundabout What are the advantages of roundabouts? • Less Traffic Conflict: Figure 2 compares the conflict points between a conventional intersection and a modern roundabout. The lower number of conflict points translates to less potential for accidents. • Greater safety(1): Primarily achieved by slower speeds and elimination of left turns. Design elements of the roundabouts cause drivers to reduce their speeds. • Efficient traffic flow: Up to 50% increase in traffic capacity • Reduced Pollution and fuel usage: Less stops, shorter queues and no left turn storage. • Money saved: No signal equipment to install or maintain, plus savings in electricity use. • Community benefits: Traffic calming and enhanced aesthetics by landscaping. (1) Statistics published by the U.S. Dept. of transportation, Federal Highway Administration shows roundabouts to have the following advantages over conventional intersections: • 90% reduction in fatalities • 76% reduction in injuries • 35% reduction in pedestrian accidents. Signalized Intersection Roundabout Figure 2: Conflict Point Comparison How to Use a Roundabout Driving a car • Slow down as you approach the intersection. • Yield to pedestrians and bicyclists crossing the roadway. • Watch for signs and pavement markings. • Enter the roundabout if gap in traffic is sufficient. • Drive in a counter-clockwise direction around the roundabout until you reach your exit. Do not stop or pass other vehicles. -
Rules for Driving Roundabouts
RULES FOR DRIVING ROUNDABOUTS www.wisconsinroundabouts.gov General information for all roundabouts Steps for driving a roundabout: Roundabouts are becoming more common 1. Slow down. Obey traffic signs. in the U.S. because they provide safer and 2. Yield to pedestrians and bicyclists. more efficient traffic flow than standard 3. Yield to traffic on your left intersections. By keeping traffic moving one-way already in the roundabout. in a counterclockwise direction, there are fewer 4. Enter the roundabout when conflict points and traffic flows smoothly. there is a safe gap in traffic. Crash statistics show that roundabouts 5. Keep your speed low reduce fatal crashes about 90%, reduce within the roundabout. injury crashes about 75%, and reduce overall 6. As you approach your exit, crashes about 35%, when compared Draft 5 February 2, 2009 turn on your right turn signal. to other types of intersection control. 7. Yield to pedestrians and When driving a roundabout, the same bicycles as you exit. general rules apply as for maneuvering Emergency vehicles in the roundabout through any other type of intersection. P Always yield to emergency vehicles. Truck apron P If you have not entered the roundabout, pull Large vehicles need more space when driving over and allow emergency vehicles to pass. in a roundabout. A truck apron is a paved area P If you have entered the roundabout, on the inside of the roundabout for the rear wheels continue to your exit, then pull over of large trucks to use when turning, sometimes and allow emergency vehicles to pass. referred to as off-tracking. -
Extruded Brick Product Profile
PRODUCT PROFILE Revised 1/2019 Glen-Gery Extruded Brick General Glen-Gery manufactures many sizes of extruded bricks in a multitude of shades and textures to accommodate the visual requirements of most projects. The more popular extruded bricks have a nominal four inch bed depth. These extruded units are often referred to as cored, stiff mud, or wirecut bricks. To differentiate between wirecut bricks and wirecut finishes, Glen-Gery refers to the wirecut finish as a velour texture. Unit Specifications Glen-Gery extruded bricks are typically manufactured to conform to the requirements of American Society for Brick Positions in a Wall Testing and Materials (ASTM) Standard Specification C 216, Grade SW, Type FBS and all grades of ASTM C 62. In Stretcher Rowlock some instances brick are manufactured to conform to ASTM C652 which includes increased core volume. These products also conform to the requirements of ASTM C 216, Grade MW. Certain Header products meet the requirements of ASTM C 216, Type FBX, ASTM C 902, ASTM C 652, or ASTM C 32. Inquiries should be made for specific applications or conformance to standards other than ASTM C 216 or C 62. When specifying this product, the specifications should cite: Soldier 1) The product name and state “as manufactured by Glen-Gery Corporation.” Sailor Rowlock Stretcher 2) Conformance to the requirements of the appropriate standard, (typically, ASTM C 216 or C652). 3) The actual unit dimensions listed as thickness x height x length. Example: Glenrose Battlefield as manu - factured by Glen-Gery Corporation to conform to the requirements of ASTM C 216, Grade SW, Type FBS.