the TTC's underground radio zones

Published Tuesday, March 11, 2025. Updated Sunday, November 30, 2025.

The TTC's radio system is transmitted underground through a series of radiating cables. I mapped this out myself by visiting most of the TTC subway stations, decoding TETRA neighbor cell discovery data, and combing through Canada's Spectrum Mangement System data.

Zones

The frequencies listed are the control channel. The secondary downlink for each site is +0.1 MHz from the control channel.

Zone 1 Kipling
from Kipling
to Old Mill
422.325 MHz
Zone 2 Keele
from Old Mill
to Ossington
422.525 MHz
Zone 3 Bay
from Ossington
to Chester
422.2625 MHz
Zone 4 Greenwood
from Chester
to Victoria Park
422.4625 MHz
Zone 5 Kennedy1
from Victoria Park
to Kennedy
422.525 MHz
Zone 6 Downsview
from York University
to Lawrence West
422.525 MHz
Zone 7 St. Clair West
from Lawrence West
to St. George
422.4625 MHz
Zone 8 Union
from St. George
to Bloor-Yonge
422.325 MHz
Zone 9 Davisville
from Bloor-Yonge
to Lawrence
422.525 MHz
Zone 10 Finch
from Lawrence
to Finch
422.2625 MHz
Zone 11 Sheppard-Yonge
from Sheppard-Yonge
to Bessarion
422.4625 MHz
Zone 12 Don Mills
from Bessarion
to Don Mills
422.325 MHz
Zone 13 VMC
from Vaughan Metropolitan Centre
to York University
422.2625 MHz

1 : I was able to recieve this with a very weak signal as far as Coxwell.

Line 5

I haven't been able to find much information about Line 5's transmitter site, but I suspect it's LA 40 with a control channel of 422.3250 MHz. I last saw it at Eglinton West (Cedarvale) station on August 7th 2025 and I think I remember seeing it at Eglinton station before.

If you chose to use this data for anything, I'd appreciate if you attribute this page.