CC Pavement Supplemental 2019Nov26 Full Size — File 209273

FY2020 Supplemental Paving Request City Council Special Meeting Mayor Joseph A. Curtatone Richard E. Raiche, PE, PMP Director of Infrastructure & Asset Management 26 November 2019

Pavement & Sidewalk Management Plan Analysis of program performance 2

Pavement Condition Index survey • Re-surveyed central Somerville • NEW for FY2020: Added private ways to database 3

PCI informs rehabilitation 4 $3.00 $18.53 $150.92 $0.00 $20.00 $40.00 $60.00 $80.00 $100.00 $120.00 $140.00 $160.00 Crack Sealing Pavement Patching Mill & Overlay with Sidewalks & Ramps Rehabilitation cost per square yard (Construction cost only, excluding engineering, police & administration)

Miles: Mill & overlay with sidewalks & ramps • Current approach, production, and backlog implies a 50 year horizon pave current miles requiring paving 5 0 0.5 1 1.5 2 2014 2015 2016 2017 2018 2019 2020 Miles completed per contract Do Nothing (100 - 88) Preventative Maintenance (87 - 47) Full Construction (46 - 0) Total Public 16.3 29.3 46.5 92.1 Private 3.5 3.9 6.7 14.2 Total 19.9 33.2 53.2 106.3

Dollars: Mill & overlay with sidewalks & ramps • Current funding and backlog implies a 50- plus year horizon to fund identified needs 6 Preventative Maintenance (87 – 47) Full Construction (46 - 0) Total Public $6,660,869 $189,666,293 $196,327,162 Private $1,089,614 $23,501,894 $24,591,509 Total $7,750,483 $213,168,188 $220,918,671 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000 $120,000,000 $140,000,000 $160,000,000 $180,000,000 $200,000,000 Public Private

Cost and time breakdown • Sidewalks & ADA ramps required for full-width repaving • Sidewalks = 60- to 65-percent of total cost, months to complete • Roadway = 35- to 40-percent of total cost, days to complete 7

High-level conclusions • Prioritization logically ranks streets • Current approach, funding, and backlog yield untenable time period for attaining acceptable pavement condition • Increasing funding and construction by a factor of 5 or 10 is unaffordable and logistically impossible • Costs and complexity of sidewalk construction drive the equation • Architectural Access Board (and our own inclusionary goals) require sidewalks with full-width repaving We need to approach PMP & SMP differently 8

New approach • Decouple sidewalks from pavement prioritization • Maintain overall funding level for sidewalks, but target pedestrian priority areas • NEW: Engineering worked with broad range of departments to develop sidewalk prioritization • Mill & overlay automobile and bike travel lanes only • Continue investment in preventative maintenance 9

Example funding 10 City Funds $3,730,000 Note: showing in 2020$ for comparison, annual  request will be escalated 4% Chapter 90 $1,200,000 Total $4,930,000 Preventative Maintenance $900,000 Sidewalk Only $2,500,000 Mill & Overlay Travel Lane Only $1,530,000

Better production with new approach • Preliminary, conservative evaluation of costs to prove concept • $0.7 to $0.8M per mile compared to $4M • 20% of full width • Goals achievable in 10 to 20 years 11 Full width & sidewalks Travel lanes only Public $189,666,293 $35,799,222 Private $23,483,439 $5,764,575 Total $213,149,732 $41,563,797 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000 $120,000,000 $140,000,000 $160,000,000 $180,000,000 $200,000,000 Public Private

Cost breakdown on average • Sidewalk = 60-percent • Parking zone = 20-percent • Travel lanes = 20-percent 12

Additional considerations • Parking lanes will remain in poor condition; however: • Curb lines likely to change in future as a result of the parking study, bike prioritization, mobility conclusions, green stormwater infrastructure needs, urban forestry, etc. • Water, sewer, drain and gas utility work likely to require full-depth reconstruction of many streets • Therefore deferring investment on the curb line and parking zone makes sense • Improves bike safety • Boston and Cambridge have started similar “partial paving” programs 13

Elm Street, Tremont Street, Cambridge 14

Revised Pavement & Sidewalk Management Plan The road to a better program 15

Prioritization Travel lanes for vehicles & bicycles Sidewalks for pedestrian routes 16

Pavement prioritization algorithm 17 NPR = (0.40 * (100-PCI)) + (0.50 * FCP) + (0.30 * PCP) + (0.10 * ADT) Network Priority Ranking (NPR) • Pavement Condition Index (PCI) • Functional Classification Priority (FCP) • Pavement Classification Priority (PCP) • Average Daily Traffic (ADT) Functional Classification FCP Value Equivalent ADT ADT Factor AR ‐ Arterial 90 20,000 100 MA ‐ Minor Arterial 80 15,000 75 CO ‐ Collector 70 8,000 40 RT ‐ Residential Local 50 2,500 15 RE ‐ Residential Dead End 40 500 5

Sidewalk management program algorithm Network Priority Ranking (NPR) • Sidewalk Condition Index (SCI) • Route Classification Priority (RCP) 18 NPR = (0.40 * (100-SCI)) + (0.60 * RCP) Route Classification RCP Value 4 – Business District 100 3 – Transit Corridor 95 2 – Dense Neighborhood 85 1 – Side Street 75 0 – Calm Street 65

Road & Sidewalk Selection Building annual construction contracts 19

Workflow 20 Calculate pavement priority & Sidewalk priority • If priority street is also a priority pedestrian route, coordinate with Mobility for design objectives Prepare full-width bid package • Estimate total cost Prepare sidewalk bid package • Target total ADA goal Prepare travel lane bid package • Maximize total length for annual funding

ID # 209273 – Requesting a supplemental appropriation of $500,000 to the Engineering Division Capital Outlay Street Repairs Account in order to perform mill and overlay paving of the travel way in prioritized streets. Agenda Item 5 21

Supplement FY2020 Construction • $3.73M bond approved by City Council 24 Oct 2017 • Mill & overlay with sidewalk reconstruction • Holland Street, College Ave from Davis to Powder House • College Ave from Powder House to City line – add-alternative • Note: These routes are also priority sidewalk routes • Sidewalk & ADA ramp construction package • Add $500,000 capital outlay for travel lane only mill & overlay • Top priority vehicle route / non-priority pedestrian route: • Inner Belt Road • Note: Mix of bond and capital outlay is a typical strategy 22

Provisional Future Plan 23

FY2021 intended use & status • Mill & overlay with sidewalk • Pearl Street • Coordination: Water complete, gas CY2020, Sewer & Mobility needed • Sidewalks & ramps • Various locations • Mill & overlay travel lane only • North Street • Utility & Mobility coordination needed 24

Long-range priorities • Mill & overlay with sidewalk • Elm Street • Broadway (Powder House to Arlington) • School Street (Medford to Highland) • Cross Street (Broadway to Auburn) • Newton Street • Mill & overlay travel lane only • Summer Street (Willow to Cedar) • School Street (Highland to Somerville) • Cameron Avenue • Mount Vernon Street • Stickney Avenue 25

FY2020 Supplemental Paving Request City Council Special Meeting Mayor Joseph A. Curtatone Richard E. Raiche, PE, PMP Director of Infrastructure & Asset Management 26 November 2019