Traffic calming update_Dec 2016 — File 202590

CITY OF SOMERVILLE, MASSACHUSETTS JOSEPH A. CURTATONE MAYOR   CITY HALL ● 93 HIGHLAND AVENUE ● SOMERVILLE, MASSACHUSETTS 02143 [phone removed], EXT. 2100 ● TTY: [phone removed]● FAX: (617) 625- 3434● www.somervillema.gov E-MAIL: mayor@somervillema.gov To:   Board of Alderman  Re:   Traffic Calming Petition Procedure Status Update   Date:   December 7, 2016  The traffic calming petition procedure is a community process designed to improve the safety and  livability of Somerville‐owned streets. This status update summarizes implementation activities during  the past nine months and outlines next steps.  It is important to note that the traffic calming petition procedure is only one aspect of the city’s traffic  calming efforts, which include reducing speed limits citywide to 25 miles per hour, expanding the 20  miles per hour safety zones, expanding and maintaining pavement markings, installing semi‐permanent  and permanent traffic impediments like speed humps and raised crosswalks, traffic enforcement, and  driver and cyclist education.    Traffic Calming Background  Traffic calming is an evolving field that describes a community process used to accomplish one or more  of the following goals on a given street segment or intersection:    1. Reduce the frequency and severity of collisions;  2. Reduce speed; and,  3. Reduce cut‐through motor vehicle traffic.   In Somerville, traffic calming is carried out through Article XIV of the Traffic Commission’s Rules and  Regulations. Prior to 2016, Article XIV required 66% of residents on a given street to sign a petition  expressing concern about the traffic safety on their street before the petition could be  submitted to the  Traffic Commission. The Traffic Engineer ultimately evaluated all petition locations and determined  appropriate interventions.     

Traffic Calming Petition Procedure  In response to calls from the community and Board of Aldermen to make it easier to submit a petition,  Somerville updated Article XIV in early 2016 by lowering the threshold for submitting a petition to either  33% of the residents on a given street or nine residents, whichever is lower.  The City also instituted a Traffic Calming Petition Procedure (Appendix 1), which establishes the action  steps the City will follow when it receives a traffic calming petition. The core of this procedure is a data‐ driven evaluation and prioritization process, the goal of which is to direct limited resources for traffic  safety improvements to the highest‐need petition locations. The procedure establishes a timeline for  accepting petitions, evaluating petitions, and implementing traffic safety improvements at high‐priority  petition locations (see Figure 1).  Figure 1. Traffic Calming Petition Procedure Timeline     Accepting Petitions  In order to prioritize petition locations to determine which are most in need of traffic safety  interventions, the City must establish a defined set, or cohort, of petitions. As established in the Traffic  Calming Petition Procedure, the City accepts petitions between March and August of each year, thereby  creating a cohort of petitions on an annual basis.   Evaluating Petitions  Once the cohort of petitions has been received, the City evaluates the petition locations, which starts  with collecting data on 19 factors for each location. These factors include average speed, traffic volume,  and proximity to playgrounds, nursing homes, or schools. Once the data is collected, the City prioritizes  the cohort of petitions according to need using the Matrix for Traffic Calming Interventions included in  the Traffic Calming Petition Procedure. The evaluation period as established in the Traffic Calming  Petition Procedure requires 7 months (from September to February) due to the significant amount of  time needed to collect data for two of the key factors (average speed and traffic volume).  Implementing Traffic Safety Improvements  With the cohort of petitions prioritized, the City makes recommendations for traffic safety  improvements at the highest‐need locations and implements those improvements with available  resources between March and November.  March April May June July August September October November December January February March April May June July August September October November December January February March April on Petition acceptance Petition evaluation Traffic safety  improvements Year 1 Year 2 Year 3 Cohort 1 Cohort 1 Cohort 1 Cohort 2 Cohort 2 Cohort 2

As reflected in the Traffic Calming Petition Procedure timeline, establishing a priority ranking of the  cohort of petitions takes 12 months, and implementation of traffic safety improvements takes another 9  months.  Status of Somerville’s Traffic Calming Procedure   The Traffic Commission received 17 traffic calming petitions in the first acceptance period after the  Traffic Calming Petition Procedure went into effect (between March and September of 2016). Prior to  the implementation of the Petition Procedure, Traffic & Parking had received 13 requests for temporary  speed bumps, and these were folded into the process, bringing the total number of petitions in the first  cohort to 30.   In response to calls from the community and the Board of Aldermen, the City expedited data collection  for the petition locations, wrapping up collection 4 months ahead of schedule. We have also evaluated  the underlying data against each of the factors in the Matrix for Traffic Calming Interventions, which will  allow us to prioritize the petition locations (our next step). This data is attached as Appendix 2.   Because this data is difficult to interpret on its own, we have also attached as Appendix 3 some of the  key underlying data, including summary traffic speed and volume for each of the petition locations.  Finally, Appendix 4 is a representative example of the detailed traffic speed and volume data that we  collect for each street in order to produce the summary data included in Appendix 3. This detailed data  will be shared with each petitioner.  The City has also named the Transportation Planner in OSPCD as the program lead for traffic calming,  improving coordination across departments and creating a central point of contact for residents with  traffic calming concerns.  Areas for Improvement and Next Steps  The City of Somerville is a learning organization and recognizes that there are improvements to be made  to the Traffic Calming Petition Procedure, chief among them the need to communicate more frequently  with traffic calming petitioners with updates on the status of their petition cohort. The City will be  reaching out to all petitioners with an update shortly.  The City has also contracted with GPI, an engineering consulting firm with extensive expertise in traffic  calming, to help us:   Complete the Traffic Calming Petition Procedure for the outstanding cohorts of petitions,  including prioritization of petition locations and identification of traffic safety improvements for  the highest‐need petition locations;   Identify improvements to the Traffic Calming Petition Procedure; and,   Identify improvements to our broader traffic calming efforts.   The City will update Board on this work in early spring of 2017. We look forward to working with the  Board of Aldermen and the community to ensure continued improvements to the safety of Somerville’s  streets. 

Appendix 1: Traffic Calming Petition Procedure      4

  1 | P a g e     CITY OF SOMERVILLE TRAFFIC CALMING PETITION PROCEDURE February 16, 20161 This document clarifies the action steps required should the City receive a Neighborhood Action Request Form (Traffic Calming) petition. This document shall serve as an interim, internal procedure while a Citywide mobility plan is in development. TABLE OF CONTENTS: I. TRAFFIC CALMING PETITION PROCEDURE ACTION STEPS – P. 2-3 II. MATRIX FOR TRAFFIC CALMING INTERVENTIONS – P. 4 III. GLOSSARY OF WARRANT TERMS – P. 5-7                                                             1 With minor updates on December 5, 2016. 5

  2 | P a g e     I. TRAFFIC CALMING PETITION PROCEDURE ACTION STEPS 1) Eligible Neighborhood Action Request Form (Traffic Calming) is submitted to the Traffic Commission via the Traffic & Parking Department. 2) Traffic & Parking Director notifies contact person on Action Request Form, including: a. Confirmation that the petition has been received and is under evaluation by the Traffic Engineer and the Traffic Unit of the Somerville Police Department. b. Explains the petition process procedure and timeline: Action Requests are accepted March 1 through August 31 and evaluated September 1 to February 28. Action requests are implemented after March 1 if approved. 3) Traffic Calming projects are prioritized by the Transportation and Infrastructure team within the Office of Strategic Planning and Community Development. Prioritization will be based on: a. Matrix evaluation. The “Matrix for Traffic Calming Interventions” (page 4) is completed by the Somerville Police Department and Traffic & Parking in conjunction with Transportation and Infrastructure. b. Planning and public safety priorities. c. Funding available for traffic calming interventions, speed studies, and other traffic calming devices. 4) Once prioritized, the Traffic Calming Team – which shall include the Director of Traffic and Parking, the Traffic Engineer, a representative from the Traffic Unit of the Somerville Police Department, and a representative from the Office March April May June July August September October November December January February March April May June July August September October November December January February March April on Petition acceptance Petition evaluation Traffic safety  improvements Year 1 Year 2 Year 3 Cohort 1 Cohort 1 Cohort 1 Cohort 2 Cohort 2 Cohort 2 6

  3 | P a g e     of Strategic Planning and Community Development – will make recommendations for next steps, which may include: a. Speed hump or other traffic calming intervention installation b. Radar study c. Recommendation for MassDOT speed study d. Resident education 5) Results of study or other recommended actions will be reported to the Traffic Commission. Notification will be as follows: a. The Traffic & Parking Director will submit a report to the Traffic Commission and inform petitioner that a report has been filed. b. Once a meeting has been established, the Traffic & Parking Director will notify petitioners of date and time for the Traffic Commission meeting. 7

  4 | P a g e     II. MATRIX FOR TRAFFIC CALMING INTERVENTIONS Warrant Criteria Satisfied (Y/N) Street Classification Street classified as either “residential” or “local” Prevailing Speed 85th percentile speed exceeds 25 mph Number of Lanes Does not exceed two lanes with one lane in each direction Street Width The paved width of the street (curb-to-curb) does not exceed 40 feet Minimum Traffic Volume Average Daily Traffic of at least 300 vehicles per day Maximum Traffic Volume Average Daily Traffic of no more than 2500 vehicle per day Street Length Street is at least 750 feet Maximum Gradient Street grade is less than 5% Minimum Curvature Radius of street curve if present is more than 300 feet Street Use Street shall not be:  truck route (at least 5% trucks of the ADT)  transit route  ”Opticon” or main corridor emergency routes Parallel Street No parallel street of equal or lower order that would be impacted due to traffic diversion Adjacent Land Use Street serves or is adjacent to a school, playground, or park, senior center, or building of worship Public Support At least 33% of residents or 9 residents on the street support the installation of a traffic calming intervention. Acceptable Location Potential location should be:  250 feet away from nearest intersection  10 feet away from nearest driveway  15 feet from nearest fire hydrant  200 feet of sight distance Number of warrants satisfied EXPLANATION OF RANKINGS All warrants shall be weighted equally, where Y=1 point and N=0 points. The requests with the highest total warrants satisfied will be prioritized and recommended for study. 8

  5 | P a g e     GLOSSARY OF WARRANT TERMS **Traffic calming interventions: A traffic calming intervention typically refers to objects that require physical changes to the streetscape. This includes, but is not limited to, speed humps, raised crosswalks, speed tables, chicanes, neckdowns, pinch points, and even the addition of on-street parking. The Matrix for Traffic Calming Interventions was created with these types of objects or changes in mind. These streetscape changes are not the only type of traffic calming interventions, however. Streets that do not fit the criteria under the Matrix for Traffic Calming Interventions may be better suited for other types of interventions, which include installing signage, planting trees, educating residents, and enforcing traffic laws. Street Classification: Traffic calming interventions should be restricted to local streets and some residential streets. These devices are not appropriate on arterials or collectors as these streets are typically designed to handle higher volumes of traffic. Prevailing Speed: Traffic calming interventions are primarily intended to slow traffic on local streets where the prevailing speed is greater than the posted speed limit. Most local/residential streets within the City of Somerville have a prima facie speed limit of 25 mph unless otherwise posted. If the result of a speed study conducted on a local street indicate that the 85th percentile speed is greater than the 25 mph speed limit, then that street is a good candidate for traffic calming intervention. Number of Lanes: Traffic calming interventions are designed for installation on a two-lane street – one lane in each direction. Streets with more than one lane in each direction are indicative of streets with potentially heavy traffic volumes and hence may not be functioning as a local street. Street Width: Traffic calming interventions should be restricted to streets with a curb-to-curb width of less than 40 feet. This width restriction is also designed to limit traffic calming interventions to local streets. Minimum Traffic Volume: If a local street has extremely low level of traffic, with rare occurrences of speed limit violation, then most traffic calming interventions will not be cost-effective. Streets with at least a minimum traffic volume level but with consistent speed limit violation make for good candidates for traffic calming intervention. Unless otherwise noted, the minimum traffic volume level considered is 300 vehicles per day. Maximum Traffic Volume: Most traffic calming interventions should not be installed on heavily traveled streets as it will result in undesired diversion of traffic to adjacent streets. This warrant ensures that traffic calming interventions are installed on truly local streets, where it is important to control speeds from a safety perspective. If a local street has a high level of traffic, then the classification of that street will be reviewed in order to confirm if it truly is a local street. Unless otherwise noted, the maximum traffic volume considered is 2,500 vehicles per day. Street Length: Drivers should have adequate warning as they approach traffic calming interventions to have adequate sight distance. In addition, it is desirable to install traffic calming interventions at a certain 9

  6 | P a g e     minimum distance from an intersection, as discussed in the “Acceptable Location” section below. To allow for these requirements, traffic calming devices should be installed on streets that are at least 750 feet long. Maximum Grade: A traffic calming intervention on a sustained downgrade may negatively impact a vehicle or may damage the calming installation itself. On the other hand, installing a traffic calming intervention on a street with a steep positive grade may be unnecessary for speed control. Consequently, traffic calming interventions are best suited for streets with less than a 5% grade. Maximum Curvature: Curvature on a street can potentially limit the sight distance to a traffic calming intervention. Furthermore, it is more difficult to construct most interventions on a horizontal curve. For this reason, interventions should be installed on curves that have a radius of at least 300 feet. Street Use: A speed hump or other traffic calming intervention cannot be installed on streets that function as a major truck route (with truck volumes at least 5% of the Average Daily Traffic, or ADT), are on a transit route or have been classified as an emergency route by the City. See “Emergency Intersections,” below. EMERGENCY INTERSECTIONS, ACCORDING TO INSTALLATION OF OPTICOM SYSTEM: Broadway/Boston Ave/Willow Ave Broadway/Cedar St Broadway/Main St Broadway/North St Broadway/Packard Ave Broadway/School St Broadway @ Teele Sq Broadway/Temple St Cedar St/Elm St Central St/Medford St Highland Ave/Central St Highland Ave @ Davis Sq Highland Ave/Lowell St Higland Ave/Medford St Highland Ave/School St Highland Ave/Walnut St Highland Ave/Willow Ave Powder House Blvd/North St School St/Medford St Summer St/Cedar St Summer St/Central St Summer St/School St 10

  7 | P a g e     Parallel Street: If a street that is being considered for traffic calming intervention has a parallel street of equal or ‘lower’ classification -- for example, another local street -- then the installation may not be appropriate due to potential diversion of traffic. In other words, the intervention installation may transfer a given problem from one local street to an adjacent local street. Adjacent Land Use: Streets that abut or provide access to schools, playgrounds or parks where the level of pedestrian activity is higher, especially with children, are candidates for installation of traffic calming intervention. Public Support: It is essential that a speed hump or other traffic calming intervention installation on any street have the support of a majority of residents on that street. A 33% level of resident support is required for this warrant, consistent with the City’s current traffic regulations. (NOTE: This warrant is included for the 2016 cohort to distinguish streets that received a petition in the 2016). Acceptable Location: Traffic calming interventions should be installed only if an acceptable location can be identified. An acceptable location for a proposed intervention location should be 250 feet from the nearest intersection, 10 feet away from the nearest driveway, 15 feet away from a fire hydrant, and provide a minimum of 200 feet of sight distance. Other interventions may still be appropriate in cases where some of these criteria are not met. 11

Appendix 2: Matrix for Traffic Calming Interventions, 2016 Petition Streets      12

Traffic Calming Request Source Date of Petition Submission Residential Street Classification Prevailing Speed Number of Lanes Avon St Speed hump request email Yes No Yes Bigelow Street 03/14/16 Yes No Yes Boston Street 03/25/16 Yes No Yes Cameron Ave Speed hump request email No Yes Yes Clarendon Ave Speed hump request email Yes No Yes Columbus Ave. 04/14/16 Yes No Yes Fairfax St 05/01/16 Yes No Yes Florence Street 05/07/16 Yes No Yes Hamlet Street 03/05/16 Yes No Yes Highland Rd 10/03/15 Yes No Yes Ibbetson St. Speed hump request email Yes No Yes Kidder Ave Speed hump request email No No Yes Kingston St Speed hump request email Yes No Yes Madison St 03/28/15 Yes No Yes Morrison Ave 09/30/15 No No Yes Munroe Street 03/25/16 Yes No Yes Newbury St (at Washburn Ave) Speed hump request email Yes No Yes Powder House Blvd (West Somerville School) Speed hump request email No Yes Yes Prospect Hill Parkway 03/07/16 Yes No Yes Putnam St Speed hump request email Yes No Yes Raymond Ave. 04/06/16 Yes No Yes Rogers Ave. 05/06/16 Yes No Yes Sartwell Street 06/17/16 Yes No Yes Somerville Ave (Veteran's Skating Rink) Speed hump request email No Yes Yes Stone Ave. 05/14/16 Yes No Yes Sycamore St Speed hump request email Yes Yes Yes Walnut Rd Speed hump request email Yes No Yes Walnut St (Giles Park) 02/20/16 No Yes Yes Warren Avenue 04/27/16 Yes No Yes Wigglesworth St Speed hump request email Yes No Yes 13

Traffic Calming Request Source Avon St Bigelow Street Boston Street Cameron Ave Clarendon Ave Columbus Ave. Fairfax St Florence Street Hamlet Street Highland Rd Ibbetson St. Kidder Ave Kingston St Madison St Morrison Ave Munroe Street Newbury St (at Washburn Ave) Powder House Blvd (West Somerville School) Prospect Hill Parkway Putnam St Raymond Ave. Rogers Ave. Sartwell Street Somerville Ave (Veteran's Skating Rink) Stone Ave. Sycamore St Walnut Rd Walnut St (Giles Park) Warren Avenue Wigglesworth St Street Width Minimum Traffic Volume Maximum Traffic Volume Street Length Maximum Gradient Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes No Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes No Yes Yes Yes Yes Yes Yes No Yes Yes No Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes No No Yes Yes Yes Yes No No Yes Yes No Yes Yes Yes Yes Yes No Yes Yes Yes No Yes No Yes Yes No Yes Yes Yes Yes Yes No Yes 14

Traffic Calming Request Source Avon St Bigelow Street Boston Street Cameron Ave Clarendon Ave Columbus Ave. Fairfax St Florence Street Hamlet Street Highland Rd Ibbetson St. Kidder Ave Kingston St Madison St Morrison Ave Munroe Street Newbury St (at Washburn Ave) Powder House Blvd (West Somerville School) Prospect Hill Parkway Putnam St Raymond Ave. Rogers Ave. Sartwell Street Somerville Ave (Veteran's Skating Rink) Stone Ave. Sycamore St Walnut Rd Walnut St (Giles Park) Warren Avenue Wigglesworth St Minimum Curvature Street Use -- NOT a Truck Route Street Use -- NOT a Transit Route Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 15

Traffic Calming Request Source Avon St Bigelow Street Boston Street Cameron Ave Clarendon Ave Columbus Ave. Fairfax St Florence Street Hamlet Street Highland Rd Ibbetson St. Kidder Ave Kingston St Madison St Morrison Ave Munroe Street Newbury St (at Washburn Ave) Powder House Blvd (West Somerville School) Prospect Hill Parkway Putnam St Raymond Ave. Rogers Ave. Sartwell Street Somerville Ave (Veteran's Skating Rink) Stone Ave. Sycamore St Walnut Rd Walnut St (Giles Park) Warren Avenue Wigglesworth St Street Use -- NOT "Opticon" or Emergency Route Parallel Street Adjacent Land Use Public Support Yes Yes No No Yes Yes No Yes Yes Yes Yes Yes Yes Yes No No Yes Yes No No Yes Yes No Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes No Yes Yes Yes Yes No Yes Yes Yes No Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No Yes Yes No Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes No Yes Yes Yes Yes No Yes Yes No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No 16

Traffic Calming Request Source Avon St Bigelow Street Boston Street Cameron Ave Clarendon Ave Columbus Ave. Fairfax St Florence Street Hamlet Street Highland Rd Ibbetson St. Kidder Ave Kingston St Madison St Morrison Ave Munroe Street Newbury St (at Washburn Ave) Powder House Blvd (West Somerville School) Prospect Hill Parkway Putnam St Raymond Ave. Rogers Ave. Sartwell Street Somerville Ave (Veteran's Skating Rink) Stone Ave. Sycamore St Walnut Rd Walnut St (Giles Park) Warren Avenue Wigglesworth St Acceptable Location -- 250ft from intersection Acceptable Location -- 10 ft from driveway Yes Yes No Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No No Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes 17

Traffic Calming Request Source Avon St Bigelow Street Boston Street Cameron Ave Clarendon Ave Columbus Ave. Fairfax St Florence Street Hamlet Street Highland Rd Ibbetson St. Kidder Ave Kingston St Madison St Morrison Ave Munroe Street Newbury St (at Washburn Ave) Powder House Blvd (West Somerville School) Prospect Hill Parkway Putnam St Raymond Ave. Rogers Ave. Sartwell Street Somerville Ave (Veteran's Skating Rink) Stone Ave. Sycamore St Walnut Rd Walnut St (Giles Park) Warren Avenue Wigglesworth St Acceptable Location -- 15 ft from hydrant Acceptable Location -- 200 ft sight distance Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes 18

Traffic Calming Request Source Avon St Bigelow Street Boston Street Cameron Ave Clarendon Ave Columbus Ave. Fairfax St Florence Street Hamlet Street Highland Rd Ibbetson St. Kidder Ave Kingston St Madison St Morrison Ave Munroe Street Newbury St (at Washburn Ave) Powder House Blvd (West Somerville School) Prospect Hill Parkway Putnam St Raymond Ave. Rogers Ave. Sartwell Street Somerville Ave (Veteran's Skating Rink) Stone Ave. Sycamore St Walnut Rd Walnut St (Giles Park) Warren Avenue Wigglesworth St Total Warrant Score 15 14 17 15 16 16 16 18 15 16 16 14 14 18 16 18 16 14 16 17 18 18 16 11 15 17 13 16 17 15 19

Appendix 3: Summary Speed and Volume Data, 2016 Petition Streets      20

Somerville Petition Streets 21

18 23 23 23 20 17 28 9 29 23 18 27 16 Street Speed (85th) Volume (ADT) Cameron Ave 29 7742 Somerville Ave 28 16952 Powder House Blvd 27 9476 Morrison Ave 23 10464 Rogers Ave 23 1784 Clarendon Ave 23 2095 Highland Rd 23 3080 Sartwell Ave 20 1963 Newbury St 18 675 Kidder Ave 18 6912 Ibbetson St 17 634 Fairfax St 16 817 Kingston St 9 380 22

25 20 23 12 22 20 24 22 19 14 25 19 19 20 19 Street Speed (85th) Volume (ADT) Sycamore St 25 2733 Walnut St 25 5858 Florence St 24 1979 Putnam St 23 3784 Hamlet St 22 3496 Wigglesworth St 22 1436 Boston St 20 3226 Madison St 20 689 Avon St 20 606 Stone Ave 19 1747 Warren Ave 19 2826 Prospect Hill Pkwy 19 2862 Munroe St 19 1926 Bigelow St 14 1360 Walnut Rd 12 405 23

Appendix 4: Representative Example of Detailed Speed and Volume Data  Collected for All 2016 Petition Streets        24

Hours Mode Speed Limit Total # Vehicles Total # Violations % Violations Average # Vehicles per day Average # of Violations per day Minimum Speed Recorded Maximum Speed Recorded Average Speed 50% Speed 85% Speed Sign Effectiveness 0:00 Display Off 30 15 0 0.0 % 5.0 0.0 5 26 19 16.3 21.5 46.3 % 1:00 Display Off 30 6 0 0.0 % 3.0 0.0 13 29 20 18.3 23.3 32.7 % 2:00 Display Off 30 4 0 0.0 % 2.0 0.0 5 24 11 10.5 11.3 24.8 % 3:00 Display Off 30 5 0 0.0 % 2.5 0.0 5 25 17 15.8 17.0 40.0 % 4:00 Display Off 30 11 1 9.1 % 3.7 0.3 9 35 21 17.9 24.1 81.8 % 5:00 Display Off 30 65 2 3.1 % 21.7 0.7 6 32 22 22.1 25.6 44.1 % 6:00 Display Off 30 229 6 2.6 % 76.3 2.0 5 36 22 22.9 26.2 40.8 % 7:00 Display Off 30 351 4 1.1 % 117.0 1.3 5 34 21 21.8 25.1 37.5 % 8:00 Display Off 30 438 4 0.9 % 146.0 1.3 5 36 19 19.9 23.7 20.9 % 9:00 Display Off 30 278 1 0.4 % 92.7 0.3 5 35 19 20.7 24.1 26.4 % 10:00 Display Off 30 241 1 0.4 % 80.3 0.3 5 31 17 18.2 23.6 30.2 % 11:00 Display Off 30 201 2 1.0 % 67.0 0.7 5 32 18 18.6 23.6 27.4 % 12:00 Display Off 30 197 0 0.0 % 65.7 0.0 5 29 16 17.5 22.7 37.5 % 13:00 Display Off 30 224 0 0.0 % 74.7 0.0 5 30 17 18.0 22.9 34.4 % 14:00 Display Off 30 232 5 2.2 % 77.3 1.7 5 34 18 19.7 24.3 34.5 % 15:00 Display Off 30 202 3 1.5 % 67.3 1.0 5 33 18 19.0 23.4 24.6 % 16:00 Display Off 30 200 3 1.5 % 66.7 1.0 5 33 18 19.0 23.3 34.7 % Notes: Time of Day: 0:00 to 23:59 Dates: 8/23/2016 to 8/25/2016 (Su, M, T, W, Th, F, Sa) Location: Traffic & Parking, Clarendon Ave., N Generated by Director Matthew Desmond For Somerville Police Department on 8/29/2016 at 11:28 AM Speed Summary Report Page 1 of 4 1 of 4 25

Hours Mode Speed Limit Total # Vehicles Total # Violations % Violations Average # Vehicles per day Average # of Violations per day Minimum Speed Recorded Maximum Speed Recorded Average Speed 50% Speed 85% Speed Sign Effectiveness 17:00 Display Off 30 259 2 0.8 % 86.3 0.7 5 31 17 17.2 23.8 49.9 % 18:00 Display Off 30 268 1 0.4 % 89.3 0.3 5 32 16 16.9 23.1 41.2 % 19:00 Display Off 30 267 3 1.1 % 89.0 1.0 5 32 16 16.2 22.2 41.5 % 20:00 Display Off 30 220 1 0.5 % 73.3 0.3 5 33 15 13.6 22.3 49.1 % 21:00 Display Off 30 136 0 0.0 % 45.3 0.0 5 30 16 15.8 21.2 40.1 % 22:00 Display Off 30 98 1 1.0 % 32.7 0.3 5 32 18 17.9 22.6 42.2 % 23:00 Display Off 30 42 3 7.1 % 14.0 1.0 5 31 20 19.7 22.0 47.3 % Total Volumes / Avg Speeds Display Off 30 4189 43 1.0 % 1,398.8 14.3 5 36 18 18.1 22.6 39.0 % Total/Avg w/o Feedback 4189 43 1.0 % 1,398.8 14.3 5 36 18 18.1 22.6 39.0 % Total/Avg w/Feedbac k 0 0 0.0 % 0.0 0.0 0 0 0 0.0 0.0 0.0 % Time of Day: 0:00 to 23:59 Dates: 8/23/2016 to 8/25/2016 (Su, M, T, W, Th, F, Sa) Location: Traffic & Parking, Clarendon Ave., N Generated by Director Matthew Desmond For Somerville Police Department on 8/29/2016 at 11:28 AM Speed Summary Report Page 2 of 4 2 of 4 26

Time of Day: 0:00 to 23:59 Dates: 8/23/2016 to 8/25/2016 (Su, M, T, W, Th, F, Sa) Location: Traffic & Parking, Clarendon Ave., N Generated by Director Matthew Desmond For Somerville Police Department on 8/29/2016 at 11:28 AM Speed Summary Report Page 3 of 4 3 of 4 27

Total Days of Data Speed Limit Average Speed Pace speed range 85th Percentile Speed 50th Percentile Speed Average Volume per Day Display Status? Minimum Speed Maximum Speed 3 30 18.06 17.95 19 to 28 22.64 No Speed Feedback 1,398.83 5 36 4,189 Total Volume Overall Summary Time of Day: 0:00 to 23:59 Dates: 8/23/2016 to 8/25/2016 (Su, M, T, W, Th, F, Sa) Location: Traffic & Parking, Clarendon Ave., N Generated by Director Matthew Desmond For Somerville Police Department on 8/29/2016 at 11:28 AM Speed Summary Report Page 4 of 4 4 of 4 28