TOWN OF BRECKENRIDGE ENGINEERING STANDARDS (DRAFT) CHAPTER 5 STREET STANDARDS TABLE OF CONTENTS 5.1 INTRODUCTION ......................................................................................................... 1 5.2 Other Standards .......................................................................................................... 1 5.3 General Design Guidelines .......................................................................................... 1 5.4 STREET CLASSIFICATION ........................................................................................ 2 5.4.1 Arterial .................................................................................................................... 2 5.4.2 Major Collector ....................................................................................................... 2 5.4.3 Minor Collector ....................................................................................................... 2 5.4.4 Local ....................................................................................................................... 3 5.5 DESIGN CONTROLS .................................................................................................. 3 5.5.1 Design Vehicles ...................................................................................................... 3 5.5.2 Design Speed ......................................................................................................... 4 5.5.3 Right-of-Way Widths ............................................................................................... 4 5.5.4 Traffic Considerations ............................................................................................. 4 5.5.5 Capacity Considerations ......................................................................................... 5 5.6 DESIGN ELEMENTS ................................................................................................... 5 5.6.1 Sight Distance ........................................................................................................ 5 5.6.1.1 Stopping Sight Distance ......................................................................... 5 5.6.1.2 Sight Distance Measurement Criteria ..................................................... 6 5.6.1.2.1 Height of Driver’s Eye ........................................................... 6 5.6.1.2.2 Height of Object .................................................................... 6 5.6.1.3 Sight Distance on Horizontal Curves ...................................................... 6 5.6.1.4 Sight Distance on Vertical Curves .......................................................... 7 5.6.1.5 Intersection Sight Distance ..................................................................... 7 5.6.1.5.1 Sight Triangles ...................................................................... 8 5.6.1.5.2 Approach Sight Triangles (Uncontrolled or Yield-Controlled Intersection) ............................................................................................ 8 5.6.1.5.3 Departure Sight Triangles (Stop Controlled Intersection) ...... 8 5.6.1.5.4 Identification of Sight Obstructions within Sight Triangles ..... 9 5.6.2 Horizontal Alignment .............................................................................................. 9 5.6.2.1 Traffic Calming ....................................................................................... 9 5.6.2.2 Horizontal Curves ................................................................................. 10 5.6.2.3 Superelevation ...................................................................................... 10 5.6.3 Vertical Alignment ................................................................................................. 11 Town of Breckenridge Engineering Standards Page i of vi Chapter 5 Streets Rev. 2/09/2021 TOWN OF BRECKENRIDGE ENGINEERING STANDARDS (DRAFT) 5.6.3.1 Terrain .................................................................................................. 11 5.6.3.2 Grades .................................................................................................. 11 5.6.3.3 Vertical Curves ..................................................................................... 11 5.6.3.4 Vertical Clearance to Obstructions ....................................................... 12 5.6.4 Cross Section Elements ....................................................................................... 12 5.6.4.1 Traveled Way ....................................................................................... 12 5.6.4.1.1 Cross Slope ........................................................................ 12 5.6.4.1.2 Lane Widths ........................................................................ 12 5.6.4.2 Shoulders ............................................................................................. 12 5.6.4.3 Roadside Design .................................................................................. 13 5.6.4.3.1 Cut and Fill Slopes .............................................................. 13 5.6.4.3.2 Roadside Ditches ................................................................ 13 5.6.4.3.3 Clear Zone .......................................................................... 13 5.6.4.3.4 Obstructions ........................................................................ 13 5.6.4.3.5 Roadside Barriers ............................................................... 13 5.6.4.3.6 Retaining Walls ................................................................... 14 5.6.4.4 Curbs .................................................................................................... 15 5.6.4.5 Medians ................................................................................................ 15 5.7 INTERSECTIONS ...................................................................................................... 15 5.7.1 Alignment and Profile ........................................................................................... 15 5.7.2 Corner Radii ......................................................................................................... 16 5.7.3 Functional Intersection Area ................................................................................. 16 5.7.4 Channelization ...................................................................................................... 17 5.7.4.1 Islands .................................................................................................. 17 5.7.4.2 Medians ................................................................................................ 17 5.7.5 Auxiliary Lanes ..................................................................................................... 17 5.7.5.1 Deceleration Lanes ............................................................................... 17 5.7.5.1.1 Storage Length ................................................................... 17 5.7.5.1.2 Tapers ................................................................................. 18 5.7.5.2 Acceleration Lanes ............................................................................... 18 5.7.5.3 Two-way Left Turn Lanes ..................................................................... 18 5.8 DEAD END STREETS (CUL-DE-SACS) ................................................................... 18 5.9 Bridges ....................................................................................................................... 19 5.10 ACCESS CONTROL AND MANAGEMENT .............................................................. 19 5.10.1 Private Access ...................................................................................................... 19 5.10.1.1 Commercial .......................................................................................... 19 Town of Breckenridge Engineering Standards Page ii of vi Chapter 5 Streets Rev. 2/09/2021 TOWN OF BRECKENRIDGE ENGINEERING STANDARDS (DRAFT) 5.10.1.2 Residential ............................................................................................ 19 5.10.2 Access Management Principles ............................................................................ 19 5.10.3 Access Permits ..................................................................................................... 20 5.10.3.1 Number of Accesses ............................................................................. 20 5.10.3.2 Location ................................................................................................ 20 5.10.4 Access Management Techniques ......................................................................... 20 5.10.5 Sight Distance ...................................................................................................... 21 5.10.6 Access Spacing .................................................................................................... 21 5.10.7 Access Width ........................................................................................................ 22 5.10.8 Access Type ......................................................................................................... 22 5.10.8.1 Curb Cut Driveway ................................................................................ 22 5.10.8.2 Radius Driveway ................................................................................... 22 5.10.9 Access Profiles ....................................................................................................