Contract 35: Traffic Signal Modifications

candidate project Construction efd08f14-333c-46f3-8ef4-917e523076eb

This is a citywide traffic safety project run by the San Francisco Municipal Transportation Agency to design and build signal improvements at 23 intersections selected primarily for pedestrian safety concerns. Planned work includes new pedestrian countdown signals, mast-arm signals to improve visibility, and left-turn or other signal-phasing changes based on collision analysis. The project recently moved into its construction phase, which is scheduled to run from April 2026 through February 2028. No cost figures have been published.AI-generated

Updates (2)

What has happened on this project: the agency's own announcements, documents it published, changes we detected in its records, and independent coverage. Each entry says where it came from.

detected Aug 8, 2026
Recorded change

Expected completion changed

Detected by sfproj

Expected completion: 2027-11-30 → 2028-02-29
detected Aug 8, 2026
Recorded change

Phase changed

Detected by sfproj

Phase: Design → Construction

Current record

Field	Value	Provenance
agency.owner	SF MTA SS - Transportation Engineering (Capital)	reported socrata:btxj-k9uh · retrieved 2026-07-17 “agency_name: SF MTA SS - Transportation Engineering (Capital)”
description	Design and construct signal improvements at 23 intersections citywide to address safety or operational concerns. These locations have been selected primarily due to pedestrian safety concerns. Improvements will likely include installing new pedestrian countdown signals, installing new mast-arm signals to improve visibility, or implementing left-turn signals or other phasing improvements as-needed per review of a collision analysis.	reported socrata:btxj-k9uh · retrieved 2026-07-17 “description: Design and construct signal improvements at 23 intersections citywide to address safety or operational concerns. These locations have been...”
location.geometry	17 geometries	reported socrata:btxj-k9uh · retrieved 2026-08-27 “17 published segment geometries”
name	Contract 35: Traffic Signal Modifications	reported socrata:btxj-k9uh · retrieved 2026-07-17 “name: Contract 35: Traffic Signal Modifications”
phase	Construction	reported socrata:btxj-k9uh · retrieved 2026-08-08 “project_phase: Construction”
project_type	Roadway	reported socrata:btxj-k9uh · retrieved 2026-07-17 “facility_type: Roadway”
schedule.end	2028-02-29	reported socrata:btxj-k9uh · retrieved 2026-08-08 “end_date: 2028-02-29T00:00:00.000”
schedule.start	2026-04-02	reported socrata:btxj-k9uh · retrieved 2026-07-17 “start_date: 2026-04-02T00:00:00.000”
source.project_id	8514	reported socrata:btxj-k9uh · retrieved 2026-07-17 “dotmapsid: 8514”
status	Active	reported socrata:btxj-k9uh · retrieved 2026-07-17 “project_status: Active”
summary	This is a citywide traffic safety project run by the San Francisco Municipal Transportation Agency to design and...	generated llm:summarize · retrieved 2026-08-08 “generated from 10 resolved fields; input sha256-v2=730d92943ae5f60b483a4b74d526e8330ae40d4f5bbf650dd9b968675162f391”

Changes

2026-08-27	field changed immaterial	{'type': 'GeometryCollection', 'geometries': [{'type': 'Point', 'coordinates': [-122.38845, 37.74298]}, {'type': 'Point', 'coordinates': [-122.41827, 37.78704]}, {'type': 'Point', 'coordinates': [-122.41904, 37.7907900000001]}, {'type': 'Point', 'coordinates': [-122.42264, 37.74393]}, {'type': 'Point', 'coordinates': [-122.42329, 37.7422800000001]}, {'type': 'Point', 'coordinates': [-122.43088, 37.7643600000001]}, {'type': 'Point', 'coordinates': [-122.43208, 37.77189]}, {'type': 'Point', 'coordinates': [-122.44111, 37.7745600000001]}, {'type': 'Point', 'coordinates': [-122.45079, 37.74575]}, {'type': 'Point', 'coordinates': [-122.45492, 37.71051]}, {'type': 'Point', 'coordinates': [-122.45585, 37.77995]}, {'type': 'Point', 'coordinates': [-122.4631, 37.76419]}, {'type': 'Point', 'coordinates': [-122.47226, 37.72163]}, {'type': 'Point', 'coordinates': [-122.48459, 37.77817]}, {'type': 'Point', 'coordinates': [-122.48488, 37.78202]}, {'type': 'Point', 'coordinates': [-122.48954, 37.7723300000001]}, {'type': 'Point', 'coordinates': [-122.49597, 37.7720300000001]}]} → {'type': 'GeometryCollection', 'geometries': [{'type': 'Point', 'coordinates': [-122.38845, 37.74298]}, {'type': 'Point', 'coordinates': [-122.41827, 37.78704]}, {'type': 'Point', 'coordinates': [-122.41904, 37.79079]}, {'type': 'Point', 'coordinates': [-122.42264, 37.74393]}, {'type': 'Point', 'coordinates': [-122.42329, 37.74228]}, {'type': 'Point', 'coordinates': [-122.43088, 37.76436]}, {'type': 'Point', 'coordinates': [-122.43208, 37.77189]}, {'type': 'Point', 'coordinates': [-122.44111, 37.77456]}, {'type': 'Point', 'coordinates': [-122.45079, 37.74575]}, {'type': 'Point', 'coordinates': [-122.45492, 37.71051]}, {'type': 'Point', 'coordinates': [-122.45585, 37.77995]}, {'type': 'Point', 'coordinates': [-122.4631, 37.76419]}, {'type': 'Point', 'coordinates': [-122.47226, 37.72163]}, {'type': 'Point', 'coordinates': [-122.48459, 37.77817]}, {'type': 'Point', 'coordinates': [-122.48488, 37.78202]}, {'type': 'Point', 'coordinates': [-122.48954, 37.77233]}, {'type': 'Point', 'coordinates': [-122.49597, 37.77203]}]}
2026-08-08	completion date changed	~~2027-11-30~~ → 2028-02-29
2026-08-08	phase changed	~~Design~~ → Construction

Source records

Public Works coordinated projects (DotMaps)

key 8514

primary · rule:dotmaps-group-by-dotmapsid

dataset page ↗ · this record’s data ↗

Assertion history (latest 100, including superseded)

Predicate	Value	Class	Recorded	State
location.geometry	17 geometries	reported	2026-08-27	live
summary	This is a citywide traffic safety project run by the San Francisco Municipal Transportation Agency to design and build signal improvements at 23 intersections selected primarily for pedestrian safety concerns. Planned work includes new pedestrian countdown signals, mast-arm signals to improve visibility, and left-turn or other signal-phasing changes based on collision analysis. The project recently moved into its construction phase, which is scheduled to run from April 2026 through February 2028. No cost figures have been published.	generated	2026-08-08	live
schedule.end	2028-02-29	reported	2026-08-08	live
phase	Construction	reported	2026-08-08	live
summary	The Contract 35: Traffic Signal Modifications is a citywide roadway safety project led by the SF MTA's Transportation Engineering division that will design and construct signal improvements at 23 intersections chosen primarily to address pedestrian safety concerns. Planned upgrades include new pedestrian countdown signals, mast-arm signals to improve visibility, and left-turn or other signal-phasing changes based on a collision analysis. The project is currently in the design phase, with construction scheduled to run from April 2026 to November 2027. No cost figures have been published.	generated	2026-07-17	superseded
location.geometry	17 geometries	reported	2026-07-17	superseded
schedule.end	2027-11-30	reported	2026-07-17	superseded
schedule.start	2026-04-02	reported	2026-07-17	live
source.project_id	8514	reported	2026-07-17	live
agency.owner	SF MTA SS - Transportation Engineering (Capital)	reported	2026-07-17	live
project_type	Roadway	reported	2026-07-17	live
phase	Design	reported	2026-07-17	superseded
status	Active	reported	2026-07-17	live
description	Design and construct signal improvements at 23 intersections citywide to address safety or operational concerns. These locations have been selected primarily due to pedestrian safety concerns. Improvements will likely include installing new pedestrian countdown signals, installing new mast-arm signals to improve visibility, or implementing left-turn signals or other phasing improvements as-needed per review of a collision analysis.	reported	2026-07-17	live
name	Contract 35: Traffic Signal Modifications	reported	2026-07-17	live