Bridging the Gaps in the Emerald Necklace: Route 9 to Brookline Avenue G.R.8 Engineers Inc. Tony Cennamo Allison Goulet Zach Shapiro Ryan St.Martin 1 BRIDGING THE GAPS IN THE EMERALD NECKLACE: Route 9 to Brookline Avenue Presented to: Peter Furth, Senior Design Project Professor April 2008 From: G.R.8. Engineers Inc. Tony Cennamo [email protected] Allison Goulet [email protected] Zach Shapiro [email protected] Ryan St.Martin [email protected] 2 Table of Contents List of Figures ........................................................................................................... ii Preface .....................................................................................................................1 1. Introduction .........................................................................................................3 2. Route Alternatives ...............................................................................................6 2.1 Netherlands Road.................................................................................................................. 6 2.2 Brookline Avenue................................................................................................................... 8 2.3 River Road ............................................................................................................................. 9 2.4 Route 9 ................................................................................................................................ 11 3. Netherlands Road ..............................................................................................13 3.1 Traffic and Route Analysis................................................................................................... 14 3.2 Design of the Boston Side Path ........................................................................................... 15 3.3 Design of the Parkway Road Bike Paths.............................................................................. 17 3.4 Cost Estimate for Netherlands Area.................................................................................... 18 4. Crossing Brookline Avenue ................................................................................20 4.1 Traffic Analysis .................................................................................................................... 20 4.2 Design of Boston Side path.................................................................................................. 25 4.3 Design of Brookline Side path.............................................................................................. 26 4.4 Cost Estimate for Brookline Avenue .................................................................................... 26 5. River Road On/Off Ramp....................................................................................28 5.1 Traffic Analysis .................................................................................................................... 28 5.2 Design of River Road Path ................................................................................................... 30 5.3 Cost Estimate for River Road area....................................................................................... 32 6. Route 9...............................................................................................................33 6.1 Design of At‐Grade Path...................................................................................................... 33 6.2 Traffic Analysis for At Grade Path ....................................................................................... 35 6.3 Design of Footbridge over Route 9...................................................................................... 35 6.4 Design of Re‐Alignment of Curley Overpass........................................................................ 41 6.5 Traffic Analysis for Elevated Paths ...................................................................................... 43 6.6 Cost Estimate for At Grade crossing.................................................................................... 44 6.7 Cost Estimate for Footbridge............................................................................................... 44 6.8 Cost Estimate for Re‐Alignment of Curley Overpass ........................................................... 45 6.9 Cost Comparison for Route Alternatives ............................................................................. 46 7. Summary............................................................................................................47 References .............................................................................................................49 Acknowledgements................................................................................................50 Appendix A – Synchro Analysis ..............................................................................51 Appendix B – Footbridge........................................................................................72 Appendix C – Curley Overpass ...............................................................................80 Appendix D – Drawings..........................................................................................81 i List of Figures Figure 0.1 – Major bike paths in Boston .......................................................................................................1 Figure 0.2 – Existing paths along Riverway...................................................................................................2 Figure 1.1 – Breaks in the Emerald Necklace................................................................................................3 Figure 1.2 – Site map of major intersections................................................................................................4 Figure 2.1 – Route Alternatives for Netherlands Road Crossing ..................................................................6 Figure 2.2 – Olmsted’s historic staircase ......................................................................................................7 Figure 2.3 – Alternatives for crossing Brookline Avenue..............................................................................8 Figure 2.4 – Intersection of Parkway Road and Brookline Avenue...............................................................9 Figure 2.5 – Route Alternatives for River Road...........................................................................................10 Figure 2.6 – Riverway on/off ramps............................................................................................................10 Figure 2.7 ‐ Route 9 Alternatives ................................................................................................................11 Figure 2.8 – Existing crossing of Route 9 ....................................................................................................12 Figure 3.1 – Netherlands Road Final Design ...............................................................................................13 Figure 3.2 – AM and PM Peak Signalized Intersections..............................................................................14 Figure 3.3 – Existing Conditions and Proposed Design for Netherlands Road ...........................................15 Figure 3.4 – Chosen design for Netherlands Road......................................................................................16 Figure 3.5 – Side‐by‐side bike paths on Parkway Road ..............................................................................17 Figure 3.6 – Cost Estimate Chart for Netherlands Road Area Construction...............................................19 Figure 4.1 – Proposed Crossing for Brookline Avenue................................................................................20 Figure 4.2 – Improved Crossing at Brookline Avenue.................................................................................21 Figure 4.3 – Light Timing for Aspinwall Avenue and Parkway Road...........................................................22 Figure 4.4 – Light Stages for Brookline Avenue, Parkway Road, and Aspinwall Road................................23 Figure 4.5 – Time‐space Diagram for Brookline Avenue: Northbound and Southbound...........................24 Figure 4.6 – Final design for the Brookline Avenue crossings ....................................................................25 Figure 4.7 – Chart for cost estimate for Brookline Area Construction .......................................................27 Figure 5.1 – Proposed Path location...........................................................................................................28 Figure 5.2 – AM Peak Signalized Intersections for River Road ...................................................................29 Figure 5.3 – PM Peak Signalized Intersections for River Road....................................................................30 Figure 5.4 – AutoCAD or picture of River Road area ..................................................................................31 Figure 5.5 – Chart of estimated cost for River Road area construction .....................................................32 Figure 6.1 – AutoCAD of final design for the at Grade Path .......................................................................34 Figure 6.2 – Location of footbridge over Route