It’s a familiar rhythm for many of us—the rumble of a train, the crowded platform, and the small hope that this time the train will arrive when it’s supposed to. For riders on the A and C lines in Brooklyn and Queens, that rhythm is about to change as the MTA launches six-year signal and track overhaul on A and C subway lines, beginning a $1.9 billion project to modernize signals and replace aging track equipment across key corridors.
Project Scope and Timeline
This upgrade is the primary story: the agency is replacing long-lived fixed-block signal equipment and worn track components across stretches of the Fulton and Liberty Avenue corridors, with work expected to run through 2032. The effort aims to bring Communications-Based Train Control, or CBTC, to sections of these routes and to phase out century-old relays, switches, and other hardware that have quietly kept service moving for decades.
Work is already underway along parts of the Fulton and Liberty Avenue corridors. The project is planned in phases so crews can tackle corridor sections in sequence rather than all at once. That phasing is intended to keep more trains moving while teams rebuild the underlying infrastructure. We should expect construction activity to be visible for most of the next six years as signal towers are dismantled, equipment rooms are refitted, and track segments are renewed.
The MTA says it will provide ongoing updates as each phase unfolds. That means we can look to periodic notices about temporary closures or reroutes, and to rolling changes in where crews are concentrated. The agency’s approach is to break the work into manageable pieces so that each corridor section can be completed and brought into service before crews move on to the next.
Technical Upgrades Planned
A central technical goal is the installation of CBTC, a digital signaling system that allows trains to be spaced more precisely than the older fixed-block system. CBTC communicates continuously with trains, enabling more responsive control of train movements and potentially allowing for closer train spacing and faster recovery from disruptions.
Paired with targeted track replacement, CBTC is expected to address several persistent maintenance pain points. New switches and signal equipment will reduce dependence on decades-old mechanical relays and worn components, and fresh track work will improve ride quality. Across other parts of the subway network, similar upgrades have led to changes in routing flexibility and service reliability, and the hope is that those same operational gains will extend to the Fulton and Liberty corridors.
Expected Benefits for Riders and the System
We are all familiar with mornings or commutes slowed by signal delays and unexpected reroutes. The MTA frames this investment as a long-term fix that should yield steadier arrivals and fewer long-term outages once work is complete. Riders can reasonably expect a gradual reduction in repetitive signal-related problems, quicker recovery from incidents, and less frequent maintenance outages over time.
Those improvements will not be immediate. Upgrades of this scale require patience from riders and coordination among crews, operators, and the agency. Still, the goal is to create a corridor that is easier to maintain and that delivers more consistent service for the people who rely on these lines daily.
What to Expect During Construction
We will see active job sites, temporary changes to service patterns, and periodic station or track work notices. The phased approach means some sections will be finished and reopened while work continues elsewhere. For those who follow the project, local reporting such as Gothamist provides updates on timelines and milestones as the work progresses. We can also watch for MTA service advisories to plan around temporary reroutes or schedules.
Looking Ahead
Six years is a long span in our daily lives, but this kind of rebuilding asks us to think in longer stretches. As we ride through construction and updated corridors, we will witness a physical renewal of infrastructure that has kept the city moving for generations. Each smoother trip, each fewer delay, will be a quiet sign of that work taking effect.
For now, we can expect a mix of inconvenience and eventual improvement. By following project updates and service notices, we can better navigate the changes and keep our routines moving while crews do the slow, necessary work of modernizing the system.
Stack Work Advances While Answers Do Not
On June 17 and 18, HPD told the first meeting of the Roosevelt Island Steam Plant Demolition Community Advisory Group that smokestack demolition had no projected start date. Residents and the CAG would receive at least five business days’ advance notice once a date was set. Scaffolding around the stacks could not proceed until soil removal and backfill were complete and the area stabilized.
