This is NO27 in Sacramento, California for the SACRT lightrail (Submitted by Christopher Grandinetti #SignalOfTheDay

SG, Liverpool Central (Submitted by Daniel James Findlay-Belfield) #SignalOfTheDay

Manchester Victoria turnback sidings (Submitted by Jacob Cookson) #SignalOfTheDay

TVS1049 TVS3023 Farringdon (Submitted by Alex Tilsley) #SignalOfTheDay

CO1056 (Submitted by Ian Freestone) #SignalOfTheDay

DC5065 Derby, with 810006 operating 1F32 passing by (Submitted by @driverbod.bsky.social) #SignalOfTheDay

Barnetby, February 2015 (Submitted by Phil Wimbush) #SignalOfTheDay #ThrowbackThursday

TL24 Up Starter on platform D at Waterloo East (Submitted by Damien Allmark) #SignalOfTheDay

BH8, Platform 4 Up Starter at Brockenhurst (Submitted by Charles James Melton) #SignalOfTheDay

PE17 Station Starter showing OFF at Prudhoe on the UP line towards Newcastle (Submitted by Paul Joseph Rowland) #SignalOfTheDay

0223 and 0222, Norra Ulvsunda (Submitted by @cranium84.bsky.social) #SignalOfTheDay

150246 at Bishops Lydeard working shuttles from Taunton for Railway 200 (Submitted by Down Relief) #SignalOfTheDay

Z1; Hønefoss, Norway; Høytskiftesignal (tall shunt signal) showing «Shunting Forbidden» (Submitted by Tr Will) #SignalOfTheDay

W3, the Wainfleet Down Starter on the Skegness Branch (Submitted by Ben Adlington) #SignalOfTheDay

YPM61 YPM60 at Yeovil Pen Mill station (Submitted by Joe Bloggs) #SignalOfTheDay

Garston (Submitted by Aidan Lee Croft) #SignalOfTheDay

BY74. Not to be mistaken for a Bletchley (UK) signal! This is 17,000km away at Banyo in Queensland, Australia (Submitted by Chris Flowers) #SignalOfTheDay

BY74. Not to be mistaken for a Bletchley (UK) signal! This is 17,000km away at Banyo in Queensland, Australia (Submitted by Chris Flowers) #SignalOfTheDay

BY74. Not to be mistaken for a Bletchley (UK) signal! This is 17,000km away at Banyo in Queensland, Australia (Submitted by Chris Flowers) #SignalOfTheDay

W5 at Clunderwen (Submitted by Rob Parsons) #SignalOfTheDay

Yes, it’s a fixed starter for the main line now the loop’s out of commission. Photo taken near La Junta on the Chihuahua - Los Mochis line. Note the gaps in the track on the loop (Submitted by @rincew1nd.bsky.social’s parents, on holiday in Mexico) #SignalOfTheDay

Fantastic aerial view of Stoke Gifford Depot. Signal aspects visible, from the top: BL1518 BL1516 BL1513 BL1522 SG02 BL1524 SG08 SG06 SG04 SG16 SG14 SG12 SG10 SG24 SG22 SG20 SG18 SG30 SG28 SG26 SG32 SG52 SG50 😮‍💨 Submitted by Alex Tilsley #SignalOfTheDay

T2842 Midgham (Submitted by Paul Carter) #SignalOfTheDay

Székesfehérvár, Hungary, V7 and V8 signals. Two uncommon aspects next to each other, taken in 2016 during the (phased) commissioning of the interlocking system (Submitted by Darázsi István) #SignalOfTheDay

Last week’s snowplough move waits the road at Pitlochry (Submitted by Phil Wimbush) #SignalOfTheDay

Exeter St Davids (Submitted by Eliott Jeary) #SignalOfTheDay

Shirebrook Junction SJ 6 with the route set for 0Z25 Derby RTC Network Rail to Thoresby Colliery Jcn (Submitted by Alan Hughes) #SignalOfTheDay

Signal BH A located at Staveley for trains to Oxenholme (Submitted by James Veitch) #SignalOfTheDay

BE13, Brookside Miniature Railway (Submitted by Daniel Patterson) #SignalOfTheDay

Severn Valley Railway Bewdley Station (Submitted by Dave K) #SignalOfTheDay

“On my friend’s layout” (Submitted by Robin Price) #SignalOfTheDay

Platform 1 starter at the Foxfield Railway. The head is ex Manchester Exchange from the 1923 resignalling (Submitted by Ron Whalley) #SignalOfTheDay

43159 ‘Rio Warrier’ at Bury Bolton Street yesterday (Submitted by Flick) #SignalOfTheDay

AD 5 - Not Ashford, but El Abiad, on the 1050 mm gauge Aqaba Railway in Jordan; May 2017. The crossing loops south from here towards Aqaba have Westinghouse entrance-exit panels (Submitted by Paul Steane) #SignalOfTheDay

M 6.69 co-acting, Burwood, Sydney (Submitted by Chris Small) #SignalOfTheDay

Swindon Transfer Sidings SW6516 (Submitted by Alan Peters) #SignalOfTheDay

Shrewsbury station’s outer home signal on the Crewe to Shrewsbury line controlled by Crewe Junction signal box (Submitted by Paul Targett) #SignalOfTheDay

Reflections at Birmingham New Street (Submitted by Paul Knapton) #SignalOfTheDay

London end of Guildford (Submitted by Phil Wimbush) #SignalOfTheDay

Platform 1 starter signal Killarney Station, County Kerry, Ireland (Submitted by Ian Clark) #SignalOfTheDay

Canadian National Railway, Mile 1.78 Dartmouth Subdivision, Waverley, Nova Scotia. Already endangered, another searchlight signal about to go dark for good. A new mast has been erected on the west side of the crossing with hooded tri-light signals (Submitted by Christopher Roberts) #SignalOfTheDay

CJ8, now decommissioned (Submitted by Daniel Bowen) #SignalOfTheDay

Stop #Stoptober ! That’s enough of that for one year #SignalOfTheDay Submitted by Robin Price

An atmospheric scene at Pickering station (Submitted by Michael Horsfield) #SignalOfTheDay #Stoptober

No. 1 STOP No. 2 STOP, Langley (Submitted by Driverbod) #SignalOfTheDay #Stoptober

Stop Board at entrance to Portbury Docks, beneath the M5 bridge (Submitted by Jason) #Stoptober #SignalOfTheDay

Stop board protecting the new ash pit at Wirksworth on the Ecclesbourne Valley Railway (Submitted by John Stokes) #SignalOfTheDay #Stoptober

The bay platform at East Hills in Sydney (Submitted by Matt Smith) #SignalOfTheDay #Stoptober

Hinksey’s reception road 2 (Submitted by Dren Ahmeti) #SignalOfTheDay #Stoptober

Temporary stopboard at Totnes Riverside on the South Devon Railway in 2016. This board was in position for special events when a temporary block post was put in, one train working suspended, and staff and ticket working implemented (Submitted by Alexander Seal) #SignalOfTheDay #Stoptober