Chuyển đến nội dung chính

Renewing San Francisco’s Subway for the 21st Century

Renewing San Francisco’s Subway for the 21st Century
By Jerri Diep

The Muni Metro system operates underground from Embarcadero to West Portal in tunnels that were constructed between 50 to 100 years ago. Considering their age and history, SFMTA has undertaken a Subway Renewal Program to ensure that this vital segment of our transportation network is brought into a state-of-good repair.

The SFMTA kicked off the first part of the Subway Renewal Program during the current shutdown, which began as a result of the pandemic in March 2020. Work is underway to improve the reliability of the system and reduce disruptions for years to come. While we had hoped to complete all the near-term items we identified during our evaluation period by the end of 2020, designing and procuring some of the more complex elements is taking longer than expected. As a result, some of that initial work will continue even as service is restored.

Photo of rails in subway tunnel with construction vehicle

Track maintenance work being undertaken prior to the return of Muni light-rail to the subway

The Subway Renewal Program lays out a systematic approach to capital upgrades over the next ten years, targeting a backlog of repairs on the most critical systems. This work will improve our subway’s resilience and prepare it for the demands of the future. Additionally, the program provides a framework for future capital work by emphasizing continuous upgrades, as well as identifying replacement needs early and ensuring they are addressed promptly.  The critical subway infrastructure items we will replace over the next ten years include tangent (straight-line) track, crossover tracks and switches. We will also upgrade our electrical systems in the subway stations, enhance ventilation and replace and upgrade our automatic train control system. Long-awaited Wi-Fi connection inside the subway tunnel is already underway and is scheduled for completion prior to the subway reopening.

We will provide more information on future construction work as it becomes available. Stay tuned! 

Current Subway Work Details

The work of our engineering and maintenance teams on Subway Renewal includes:

  • Replacing defective splices on the overhead lines, installing new wire to reduce frequency of splices and redesigning support structures to optimize alignment, eliminating slow zones
  • Grinding rail to reduce wear on rolling stock, improve ride quality, and extend life of the rail
  • Spot-replacing track fasteners and rails in areas of higher wear and deterioration due to ground water
  • Replacing track switch machinery in the Muni Metro Turnaround area east of Embarcadero to ensure smooth operations at this critical junction
  • Replacing ballast in the Eureka Curve Tunnel to address rail stability and drainage issues
  • Upgrading Subway Lighting to allow for improved visibility during maintenance work and emergency response
  • Providing customer Wi-Fi access

Subway Work Timeline and Rail Service Return

The timing of rail service returning will align with the completion of safety and operational improvements inside the subway tunnel. The subway will operate initially with limited hours: underground service will stop and shift to bus shuttles at 8:30 p.m. for evening and late-night service due to anticipated low ridership and the need to complete the ongoing improvements of the renewal plan.

The T Third will be first the rail line to enter the subway at Embarcadero Station, once that location is operational, tentatively scheduled for January 23, 2021. The T Third line will operate on the surface between Sunnydale and the Embarcadero, where it will terminate, until full subway service can be returned.

In spring 2021, pending subway repairs and COVID-19 developments, we will extend the T Third rail service through the subway to West Portal and we restart the N Judah. We expect the K Ingleside, L Taraval and M Ocean View to remain as bus routes through the spring while we train more rail operators and complete the first phase of the L Taraval construction project.

We know many San Franciscans rely on our light rail service and we apologize for the inconvenience the continued closure of our rail system has caused. We are working hard to bring rail service back in better shape for a more comfortable and reliable ride. And, through our Subway Renewal Program, we’re planning for more reliable rides in the long-run. We thank you Muni customers for your patience while we work to bring the system up to the standard you deserve.

For updates on rail recovery efforts, please visit SFMTA.com/RailRecovery.

 

 

 



Published January 14, 2021 at 11:01PM
https://ift.tt/3oNOgAT
Nhãn:

Nhận xét

Đăng nhận xét

Bài đăng phổ biến từ blog này

Đảm bảo tiêu chí Coherence và Cohesion trong IELTS Writing

Coherence & Cohesion là một trong bốn tiêu chí chủ chốt để đánh giá bài IELTS Speaking và Writing . Trong bài viết dưới đây, mời các bạn cùng IELTS Vietop tham khảo lại định nghĩa và những cách để đảm bảo tiêu chí Coherence và Cohesion trong IELTS Writing nhé! Tiêu chí Coherence và Cohesion trong IELTS Writing là gì? Tiêu chí Coherence & Cohesion là hai khía cạnh quan trọng trong việc đánh giá và phân tích một bài IELTS Writing. Trong đó: Tiêu chí Coherence và Cohesion trong IELTS Writing là gì Coherence (tính liên kết): Mức độ mà các ý tưởng trong văn bản liên kết với nhau một cách hợp lý và có tổ chức. Nó đảm bảo rằng các ý tưởng trong văn bản được trình bày theo một cách mạch lạc và dễ hiểu. Người viết cần sử dụng các từ nối, cụm từ, và cấu trúc câu hợp lý để giúp cho các ý tưởng trong văn bản được trình bày một cách logic và mạch lạc. Cohesion (tính gắn kết): Mức độ mà các câu trong văn bản gắn kết với nhau một cách hợp lý và tự nhiên. Nó đảm bảo rằng các câu t...
Đăng nhận xét
Đọc thêm

Talk about generation gap – Bài mẫu IELTS Speaking part 1, 2, 3

Talk about generation gap là dạng đề bài không quá dễ dàng đối với các bạn đang ôn luyện thi IELTS . Để có thể làm tốt chủ đề này, thí sinh cần nắm chắc từ vựng và cấu trúc về chủ đề Generation Gap (Chênh lệch thế hệ). Hôm nay, IELTS Vietop sẽ cung cấp cho bạn Talk about generation gap – Bài mẫu IELTS Speaking Part 1, 2, 3. 1. Từ vựng Talk about generation gap Generation gap /ˌʤɛnəˈreɪʃən ɡæp/ (n): Khác biệt thế hệ Ageism / ˈeɪˈʤɪɪzᵊm/ (n): Phân biệt đối xử dựa trên độ tuổi Technology divide / tɛkˈnɑləʤi dɪˈvaɪd/ (n): Sự khác biệt về sử dụng công nghệ Cultural shift /ˈkʌlʧərəl ʃɪft/ (n): Sự thay đổi văn hóa Traditional values /trəˈdɪʃənəl ˈvæljuz/ (n): Giá trị truyền thống Intergenerational conflict /ˌɪntərˈʤɛnəˈreɪʃənəl ˈkɑnflɪkt/ (n): Xung đột đa thế hệ Communication breakdown /kəmˌjunəˈkeɪʃən ˈbreɪkˌdaʊn/ (n): Mất liên lạc trong giao tiếp Respect for elders /rɪˈspɛkt fɔr ˈɛldərz/ (n): Sự tôn trọng người lớn tuổi Lifestyle differences /ˈlaɪfˌstaɪl ˈdɪfərənsɪz/ (n)...
Đăng nhận xét
Đọc thêm

Reading Practice: Toxic stress a slow wear and tear

A. Our bodies are built to respond when under attack. When we sense danger, our brain goes on alert, our heart rate goes up, and our organs flood with stress hormones like cortisol and adrenaline. We breathe faster, taking in more oxygen, muscles tense, our senses are sharpened and beads of sweat appear. This combination of reactions to stress is also known as the “fight-or-flight” response because it evolved as a survival mechanism, enabling people and other mammals to react quickly to life-threatening situations. The carefully orchestrated yet near-instantaneous sequence of hormonal changes and physiological responses helps someone to fight the threat off or flee to safety. Unfortunately, the body can also overreact to stressors that are not life-threatening, such as traffic jams, work pressure, and family difficulties. B. That’s all fine when we need to jump out of the way of a speeding bus, or when someone is following us down a dark alley. In those cases, our stress is considere...
Đăng nhận xét
Đọc thêm