ATTACHMENT 1 SONOMA MARIN AREA RAIL TRANSIT DISTRICT DESIGN CRITERIA MANUAL Reissued: June 4, 2019 BLANK PAGE LEFT INTENTIONALLY SONOMA MARIN AREA RAIL TRANSIT DISTRICT DESIGN CRITERIA MANUAL Table of Contents CHAPTER 1 - DESIGN GUIDELINES ............................................................................................... 1 A. PURPOSE .......................................................................................................................... 1 A.1.0 REVISIONS ........................................................................................................................................... 1 A.2.1 OTHER SMART DOCUMENTS .............................................................................................................. 2 B. SONOMA MARIN AREA RAIL TRANSIT DISTRICT (SMART) ................................................... 2 FIGURE 1-1 SMART SYSTEM MAP ..................................................................................................................... 3 B.1.0 SMART MISSION ................................................................................................................................. 4 B.2.0 NORTH COAST RAILROAD AUTHORITY FACILITIES .............................................................................. 4 B.3.0 PROJECT DELIVERY METHODS ............................................................................................................ 4 C. PLANNING AND DESIGN CONSIDERATIONS ........................................................................ 4 C.1.1 PLANNING CONSIDERATIONS ............................................................................................................. 5 C.2.0 GENERAL DESIGN CONSIDERATIONS .................................................................................................. 7 C.3.0 SYSTEMS INTEGRATION ...................................................................................................................... 8 C.4.0 SYSTEM SAFETY AND SECURITY CERTIFICATION ................................................................................. 8 C.5.1 VALUE ENGINEERING .......................................................................................................................... 8 D. VARIANCES FROM DESIGN CRITERIA .................................................................................. 9 E. APPENDIX ....................................................................................................................... 10 CHAPTER 2 - TRACK................................................................................................................. 12 A. GENERAL ........................................................................................................................ 12 B. TRACKWORK ................................................................................................................... 12 C. TRACK STRUCTURE .......................................................................................................... 13 C.1.0 SUBGRADE ........................................................................................................................................13 C.2.0 SUBBALLAST......................................................................................................................................13 C.3.0 BALLAST ............................................................................................................................................13 C.4.0 CROSS TIES ........................................................................................................................................14 C.5.0 OTHER TRACK MATERIAL (OTM) .......................................................................................................15 C.6.0 RAIL ...................................................................................................................................................15 C.7.0 AT-GRADE CROSSINGS ......................................................................................................................15 June 4, 2019 TOC Page i SONOMA MARIN AREA RAIL TRANSIT DISTRICT DESIGN CRITERIA MANUAL D. SPECIAL TRACKWORK ...................................................................................................... 16 D.1.0 TURNOUTS AND CROSSOVERS .........................................................................................................16 D.2.0 APPLICATION OF TURNOUTS AND CROSSOVERS .............................................................................16 TABLE 2-1 TURNOUT SPEEDS ..........................................................................................................................17 D.3.0 DERAILS ...............................................................................................................................................18 D.4.0 RAILROAD CROSSINGS ........................................................................................................................18 E. TRACK GEOMETRY .......................................................................................................... 19 E.1.0 HORIZONTAL ALIGNMENT ................................................................................................................19 TABLE 2-3 MINIMUM TANGENT LENGTH (MAIN TRACK) ...............................................................................20 TABLE 2-4 MINIMUM TANGENT LENGTH (YARD AND NON-REVENUE TRACKS) ............................................21 TABLE 2-5 DESIGN SPEEDS THROUGH CURVES ..............................................................................................21 E.2.0 SUPERELEVATION .............................................................................................................................24 E.3.0 SPIRALS .............................................................................................................................................25 FIGURE 2-2 CIRCULAR CURVE WITH SPIRAL TRANSITION...............................................................................26 E.4.0 COMPOUND CIRCULAR CURVES .......................................................................................................27 E.5.0 VERTICAL ALIGNMENT ......................................................................................................................28 F. HORIZONTAL AND VERTICAL CLEARANCE ......................................................................... 30 G. YARD TRACK ................................................................................................................... 31 G.1.1 TRACK GEOMETRY ............................................................................................................................31 G.2.1 TRACK MATERIALS ............................................................................................................................31 G.3.0 DIRECT FIXATION TRACK (DF) ...........................................................................................................32 G. 4.0 TRACK DRAINAGE .............................................................................................................................32 G.5.0 AT-GRADE ROAD/TRACK CROSSINGS AND PAVED TRACK ................................................................32 G.6.0 TRACK BUMPERS...............................................................................................................................32 CHAPTER 3 - NON-MOTORIZED PATHWAY ................................................................................ 33 A. INTRODUCTION .............................................................................................................. 33 A.1.0 LIMITATIONS .....................................................................................................................................33 B. REGULATORY AUTHORITIES AND STANDARD PRACTICES ................................................. 33 B.1.0 REGULATORY AUTHORITIES ..............................................................................................................33 B.2.0 STANDARD PRACTICES ......................................................................................................................34 C. PATHWAY DESIGN STANDARDS AND GUIDELINES ............................................................ 35 C.1.0 WIDTH ...............................................................................................................................................35 C.2.0 MATERIALS AND LOADING ...............................................................................................................37 C.3.0 SETBACKS AND CLEARANCE ..............................................................................................................37 June 4, 2019 TOC Page ii SONOMA MARIN AREA RAIL TRANSIT DISTRICT DESIGN CRITERIA MANUAL C.4.0 PATHWAY GEOMETRY ......................................................................................................................38 C.5.0 SIGNAGE, STRIPING AND SAFETY ......................................................................................................39 C.6.1 PATHWAY BRIDGES ...........................................................................................................................40 CHAPTER 4 - STATIONS ........................................................................................................... 43 A. GENERAL .......................................................................................................................