MBTA Upzone +
An Interactive Tool to Visualize A Futrue When the ACT Is RealizedMIT 6.C35 Interactive Data Visualization & Society2024.04 - 2024.05
[Location]
Cambridge, MA
[Team Member]
Juan Atehortua Paredes, Chenan Shen, Jin Gao
[Keywords]
Data Visualization, Interactive Map, Upzoing, MBTA ACT
Abstract
Problem Statement
“MBTA communities” are 65 cities and towns that host MBTA service Motivation: an MBTA community shall have at least one zoning district of reasonable size in which multi-family housing is permitted as of right. [1]
This project expands on the upzone plan originally proposed by Milton, incorporating various data sources and interactive elements. The objective is to enhance the tool’s capability to deliver comprehensive information, allowing users to visualize and better understand the upzone plan.
Fig.1 MBTA Communities ACT
Target Audience
Audience:Residents in Milton and the general public, including local residents and newcomers.
Goal:The main objectives are to visualize the advantages of transit-oriented development and to clarify the concept of an up-zoned built environment.
Takeaway Message for the Audience:The upzone density requirement is not far from current density.
Developing areas around transit stations can greatly enhance accessibility to essential urban resources.
An effective transportation system can be achieved by increasing residential density near transit stations, encouraging more people to utilize public transit.
Goal:The main objectives are to visualize the advantages of transit-oriented development and to clarify the concept of an up-zoned built environment.
Takeaway Message for the Audience:The upzone density requirement is not far from current density.
Developing areas around transit stations can greatly enhance accessibility to essential urban resources.
An effective transportation system can be achieved by increasing residential density near transit stations, encouraging more people to utilize public transit.
Design Decision
Decision 2: Slider
In the interactive map page, the slider is a pivotal feature. It serves two main functions: allowing users to adjust the number of units on each selected parcel and providing detailed information about those parcels. The slider's minimum value indicates the current number of units in a selected parcel, while the gray range highlights the density gap between the current state and the MBTA's required density of 15 units per acre. Whenever a user selects a parcel, the slider updates reactively, displaying both the current conditions and the shortfall to the expected density. This dynamic feature helps users gain a seamless spatial understanding of which parcels already comply with the MBTA requirements and offers insights into how close the current densities are to these requirements. As users interact with different parcels, they acquire a practical understanding of the zoning potential and the feasibility of reaching the MBTA's density goals.
Decision 3: Side PanelAnother significant feature in the interactive map is the side panel in. This is where the distribution of each selected parcel's density will be displayed according to each sub-district. The scatter plot reactively shows the different nature of different upzone sub-districts, and also integrates visual representations of corresponding building types for each density level, such as the front-gabled roof. This comprehensive display serves to demystify the concept of density, making the potential impacts of rezoning both clear and relatable. By providing this real-time, reactive visualization, the tool enhances user engagement and comprehension, allowing them to see how zoning changes might physically transform their community. The goal of this feature is to engage with the audience by providing real-time feedback for their actions, effectively bridging the gap between abstract urban planning concepts and their practical implications, and fostering informed community involvement and decision-making.
Decision 4: Transit View To emphasize the importance of the MBTA stations in the MBTA Communities Act, we allow the user to click on any station to show our 'transit view' visualization. This consists on the map zooming out, showing points of interest (POI) around Boston (hospitals, schools, libraries, etc.), and showing the 15, 30, and 60 minute isochrones originating from the station, with an additional side panel that allows the user to change the mode of transportation and see additional information. With this visualization, we hope to highlight the importance of the stations in being able to commute and access important resources, furthering our argument that parcels close to these should be prioritized for upzoning.
Decision 5: Interactive TutorialTo guide the user in learning to use the tool interactively, we designed a tutorial component for the application. This tutorial is a vibrant, step-by-step journey to empower new users to effectively navigate and utilize the tool by understanding its zoning laws and transportation system.
For the design, the tutorial box shares the same aesthetic style as the sidebar. It highlights elements dynamically when describing specific features and controls they need to interact with, letting the user understand what is being described and what interactivity a user can perform. The placement of the 'Help' button aims at easily accessible yet unobtrusive, embodying the principle of 'there when you need it, invisible when you don’t.'.
Data Analysis
We focus mainly on Milton and visualize the upzoning household-job dynamics in relation to public transport commute time. We use the US Census LODES Dataset [2] filtered to jobs where the employee lives in Milton. When we upzone a parcel, we calculate the commute of the new residents by computing the isochrone centered around the parcel for 15, 30, and 60 minutes on public transportation from TravelTime API [3]. We sample randomly 1000 times from filtered jobs data and aggregate the jobs within each isochrone to generate our commute estimates.
Result 1: Housing Crisis in MiltonIn addressing the pressing housing crisis in Boston, our analysis begins by comparing single-family home prices across MA with those in the broader U.S. market. The data reveal that prices in Massachusetts have escalated to nearly double the national average, highlighting a severe housing crisis within the state (Fig. 6). Zooming in on Milton, we observe a stark contrast in housing production trends over the decades (Fig. 7). Despite the rising prices, new housing development has sharply declined, with the majority of homes built before 1980. This drop in production exacerbates the housing scarcity, further inflaming market prices. After explaining the MBTA Act, which is a legislative effort to address these challenges, our analysis of compliance across these municipalities shows a mixed response, with Milton being one of the two towns that rejected the act. Overall, before the audience interacts with our map, it is essential to understand the housing problem and why our focus is specifically on Milton. This backdrop ensures a clear context as users explore the interactive elements.
Fig. 6 Massachusetts Single-Family Home Prices 1975-2020: A Comparison with National Trends
Fig. 7 Decadal Decline in Housing Production in Milton, 1939-Present
Result 2: FeasibilityThe tool's analysis highlights that the upzone plan is highly feasible. For instance, in the Eliot Street Corridor, despite the substantial gap between current density and the MBTA's required density of 15 units per acre, most parcels are small, with a maximum unit limit of three. This limitation ensures that the unique characteristics of the district remain intact. Conversely, Milton Ave and East Milton Square have the capacity for much higher densities, which can balance the lower-density areas and meet the MBTA Act's overall average density requirement. The scatter plot reflects that a significant portion of parcels in the upzoning districts already exceed the required 15 units per acre, underscoring that upzoning is feasible and unlikely to disrupt the district's character. This balance suggests that strategic upzoning can alleviate density pressures in certain areas while preserving the overall characteristics of the community.
Fig. 8 Density Visualizer
Result 3: Resource AccessibilityBy aggregating important resource locations in the map and examining the driving and public transport isochrones in different locations around Boston, we see that locations close to MBTA stations have comparable commute times to said resources when taking public transportation vs driving. This is in contrast to areas in the Boston area with little accessibility to public transport, where the difference in commute time to reach resources like hospitals and libraries becomes much more stark between the modes of transportation. This further provides reasoning on the responsibility that MBTA communities like Milton have to upzone areas around the stations.
Result 1: Housing Crisis in MiltonIn addressing the pressing housing crisis in Boston, our analysis begins by comparing single-family home prices across MA with those in the broader U.S. market. The data reveal that prices in Massachusetts have escalated to nearly double the national average, highlighting a severe housing crisis within the state (Fig. 6). Zooming in on Milton, we observe a stark contrast in housing production trends over the decades (Fig. 7). Despite the rising prices, new housing development has sharply declined, with the majority of homes built before 1980. This drop in production exacerbates the housing scarcity, further inflaming market prices. After explaining the MBTA Act, which is a legislative effort to address these challenges, our analysis of compliance across these municipalities shows a mixed response, with Milton being one of the two towns that rejected the act. Overall, before the audience interacts with our map, it is essential to understand the housing problem and why our focus is specifically on Milton. This backdrop ensures a clear context as users explore the interactive elements.
Result 2: FeasibilityThe tool's analysis highlights that the upzone plan is highly feasible. For instance, in the Eliot Street Corridor, despite the substantial gap between current density and the MBTA's required density of 15 units per acre, most parcels are small, with a maximum unit limit of three. This limitation ensures that the unique characteristics of the district remain intact. Conversely, Milton Ave and East Milton Square have the capacity for much higher densities, which can balance the lower-density areas and meet the MBTA Act's overall average density requirement. The scatter plot reflects that a significant portion of parcels in the upzoning districts already exceed the required 15 units per acre, underscoring that upzoning is feasible and unlikely to disrupt the district's character. This balance suggests that strategic upzoning can alleviate density pressures in certain areas while preserving the overall characteristics of the community.
Result 3: Resource AccessibilityBy aggregating important resource locations in the map and examining the driving and public transport isochrones in different locations around Boston, we see that locations close to MBTA stations have comparable commute times to said resources when taking public transportation vs driving. This is in contrast to areas in the Boston area with little accessibility to public transport, where the difference in commute time to reach resources like hospitals and libraries becomes much more stark between the modes of transportation. This further provides reasoning on the responsibility that MBTA communities like Milton have to upzone areas around the stations.
Project Reflection
Reflecting on this project, we realized that the interactive tool has the potential to significantly enhance community engagement and understanding of urban planning proposals. The incorporation of interactive features like sliders provided a user-friendly way to explore complex zoning information, which likely increased accessibility and clarity for all users, including those less familiar with such data. Our approach to integrating detailed visual representations of potential developmental impacts helped demystify the rezoning process and showcased how proposed changes could realistically affect the community. This project also highlighted the importance of community input and the potential for visual tools to facilitate more informed discussions. These lessons underscore the value of merging technical data analysis with user-friendly interfaces to foster broader community involvement and support. As we look forward to future projects, applying these insights can guide more effective and engaging data storytelling efforts, especially in contexts like local government or community-focused initiatives where clear communication and public participation are crucial.
References
[1] “Multi-Family Zoning Requirement for MBTA Communities | Mass.gov,” https://www.mass.gov/info-details/multi-family-zoning-requirement-for-mbta-communities.
[2] US Census Bureau Center for Economic Studies, “US Census Bureau Center for Economic Studies Publications and Reports Page,” https://lehd.ces.census.gov/data/.
[3] “Isochrones (Fast) API Reference Page | TravelTime API Documentation,” https://docs.traveltime.com/api/reference/isochrones-fast.
[2] US Census Bureau Center for Economic Studies, “US Census Bureau Center for Economic Studies Publications and Reports Page,” https://lehd.ces.census.gov/data/.
[3] “Isochrones (Fast) API Reference Page | TravelTime API Documentation,” https://docs.traveltime.com/api/reference/isochrones-fast.