miércoles, 6 de enero de 2021
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Why Does Construction Take So Long?
By Amy Fowler
Tired of construction in San Francisco? You are not alone. With so many city projects and private developments raising dust across the city, our iconic skyline can more closely resemble a giant Erector set than a world-class city. Without these necessary upgrades, however, roads would crumble, traffic signals would be stymied by aging technology and century-old sewer and water pipes would be vulnerable to earthquakes and climate change.
New pedestrian refuge island under construction at Geary Boulevard and Steiner Street as part of the Geary Rapid Project.
But why does construction take so darn long?
There are many factors that can turn a seemingly simple project into an extraordinarily complex undertaking. Chief among them is that many SFMTA projects are done in the public right of way. Unlike private developments that are usually self-contained, our projects happen in areas where people need to walk, drive, bike and take transit.
Considerations like traffic control, maneuvering around existing utilities, providing adequate space for construction crews to work and maintaining access to neighboring businesses and homes all take a considerable amount of coordination. There may also be impacts to transit that require relocating a bus stop or safely rerouting people walking around construction sites. Support from utilities is often required when working around existing electrical wires, or additional SFMTA staff may be needed to isolate the overhead contact system that powers our zero-emissions electric-trolley buses.
There are also trade-offs to work out, like storing construction materials in a location that’s close enough for crews to work efficiently without causing too great a disruption to the neighborhood. And on busy thoroughfares like Van Ness Avenue or Geary Boulevard, all the work must happen within limited hours of the day to maintain traffic flow.
Every element of a project must be sequenced properly so that all the parts can move in sync. It’s like tipping over a stack of dominoes: if one of those dominoes gets moved due to a conflict, schedules or crews may need to be reshuffled to keep the overall work from being delayed.
So what about those trenches that are dug up, filled and then re-dug?
Underground utility work like replacing aging water or sewer mains is time-consuming and often requires trenches to be opened, covered and opened again. First, smaller holes are dug—a process called “potholing”—to determine the location of any existing utilities that may not appear accurately on utility records, including electric or gas lines. Then the work trench is carefully excavated, and any old or abandoned utilities that are in conflict are removed before the new pipes can be installed. In some cases, the project must be redesigned if unforeseen obstacles cannot simply be removed.
Water pipes must be disinfected and tested before reconnecting a property’s water service to a newly installed main; on some blocks there may be dozens of individual switchovers. Trenches must be covered the at the end of each shift for safety reasons and to restore travel lanes to vehicle traffic. Only when these steps are complete can crews restore the work area with a strong concrete base above the trenches and repave the roadway.
Another reason projects can be lengthy lies in the city’s excavation code, which aims to coordinate agencies’ work. The SFMTA works in close collaboration with our city partners in the Planning Department, Public Utilities Commission and Public Works to combine utility, transit, safety and streetscaping improvements into one package—which can sometimes make a project longer but means we don’t have to come back and tear up the road again every few years. Coordinating transit improvement projects with other planned work can therefor reduce overall disruption to communities and save money by reducing the amount of excavation needed.
Projects like Central Subway and the Van Ness, Geary Rapid and L Taraval Improvement are no exception when it comes to complexity. Each project has its own unique challenges based on existing conditions, scope of work and community considerations that can affect how work is sequenced.
The SFMTA works closely with contractors, local businesses and residents to minimize construction impacts to the community. We know how difficult construction can be when it’s right at your doorstep, and we’re grateful for your patience as we work to build a better San Francisco.
A Muni bus sign encourages visitors to Japantown, part of the Geary Rapid Project’s business support program. SFMTA projects include construction mitigation plans tailored to suit the local neighborhood and offset potential impacts.
Published January 06, 2021 at 08:44PM
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martes, 5 de enero de 2021
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22 Fillmore Moves to Mission Bay, Makes Way for the 55 Dogpatch
By Erin McMillan
Starting Saturday, January 23, the eastern section of the 22 Fillmore will shift its route to begin serving Mission Bay. Utilizing the new transit and street amenities along 16th Street, the 22 Fillmore will travel east from the Mission to 3rd Street to serve medical facilities and the growing residential and commercial areas in the Mission Bay neighborhood. In addition to increasing service to the Mission Bay neighborhood, this move will provide an improved east-west connector from the Mission neighborhood to Mission Bay, increasing transit access to jobs and healthcare services. This 5+ mile bus route serves nearly 18,000 daily customers from the Marina through the Mission and soon to Mission Bay, improving Muni service to all the neighborhoods in between.
Start of the 55 Dogpatch
Moving the eastern segment of the 22 Fillmore to Mission Bay provided an opportunity to work with the communities of Potrero Hill and the Dogpatch to find ways to improve transportation in their neighborhoods. Beginning with an initial assessment of transportation options and potential future development in the area, SFMTA worked to find what type of transit service would best serve these neighborhoods. After a few years of research and extensive outreach, the community-informed 55 Dogpatch was born as a new Muni route to maintain and enhance transit connections between 16th St Mission BART, Potrero Hill and the Dogpatch. Service on the 55 Dogpatch will also begin on Saturday, January 23.
These adjustments to Muni service comes after the completion of the first phase of the multi-agency 16th Street Improvement Project from Potrero Avenue to 3rd Street that includes new signalized intersections, new transit islands and transit bulbs for safer and more efficient bus boarding, new pedestrian bulbs to reduce crossing distances for people walking, new ADA ramps at each intersection, new street lights to illuminate the streets, 50 new trees along 16th street, curb-to curb paving and new sewer and water pipes. The completion of this phase means a safer and overall more pleasant experience for the community, Muni customers and people walking. This project made community-informed improvements to address the needs of current and future residents and is part of Muni Forward, an initiative to create a safe, reliable and comfortable experience on and off transit.
Additional information about all service changes that are planned to begin on Saturday, January 23 can be found on our blog.
Published January 05, 2021 at 10:31PM
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The Art of Balancing Work and Life: Tips and Strategies
Mastering the Art of Balancing Work and Life In today's fast-paced world, many individuals struggle to find a healthy balance between th...
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Watch video on YouTube here: https://youtu.be/3tGZ-bSpFWE
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Watch video on YouTube here: https://youtu.be/PzDZWY6mgGg
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Watch video on YouTube here: https://youtu.be/ntljnJmlIv0
