Fromre- +‎signal.

resignal (third-person singular simple presentresignals,present participleresignalingorresignalling,simple past and past participleresignaledorresignalled)

1. Tosignal again
2. To equip (a railway) with newsignalling equipment.
   • 1960 December, “The Glasgow Suburban Electrification is opened”, inTrains Illustrated, page713:

     The Stage I electrified area has beenresignalled throughout with colour-lights, which in due course will be associated with B.R. standard A.W.S., and 27 signalboxes now do the work of the steam age's 56.

   • 2018 July 18, Paul Stephen, “Shrewsbury's record-breakers”, inRAIL, number857:

     This arrangement remains firmly in place 21 years later, although it will almost certainly succumb to being fullyresignalled within the next 15-20 years as part of the policy adopted by Network Rail in 2011 to centralise signalling and migrate control of the entire network to 12 Rail Operating Centres (ROCs).

• aligners,salering,lasering,seringal,engrails,sanglier,slangier,signaler,Salinger,inlarges,nargiles,realigns,arseling,seal ring