Air carrier flight crew reported Taxiway R1 at WSSS (Singapore) has no marking sign or hold line from Taxiway T which resulted in a possible taxiway incursion.
Synopsis
Air carrier flight crew reported Taxiway R1 at WSSS (Singapore) has no marking sign or hold line from Taxiway T which resulted in a possible taxiway incursion.
Narrative
Taxiing to Runway 20C via Taxiway Tango; ATC advised Aircraft X to hold short of Taxiway R1. Minimal signage during the taxi on Tango made identifying the correct holding line for R1 difficult to see from the right seat. ATC queried as to whether we were stopping for the hold short line of R1; and I advised that we were. We made a stop short of a hold line; which upon further inspection; may have been the hold line for Taxiway Tango itself. No identifying ground signage was evident from the right seat to indicate which line was what. I could see that our nose was just short of a line; and made the reply to Singapore Ground to confirm same. At no time did I see any red lights or other markings to suggest multiple hold lines; or to specifically identify which hold short line to stop by from the right seat. If any lights were illuminated; it was not well timed; and if turned on; were not illuminated until they were well below the nose to prevent any visibility to see them. At no time was safety of flight or separation of aircraft jeopardized; and the remainder of the flight was uneventful.
Second reporter narrative
Taxiing north on Taxiway T for a 20C departure we were given instructions to hold short of Taxiway R1. Being that Taxiway R1 has no markings; hold line or stop bar; the crew had to presume where to hold short. Apparently; we taxied slightly beyond where the Ground Controller wanted us to in order to get Aircraft Y on P4 into a parking spot. There was more than adequate spacing for the Aircraft Y to get into that spot but the Ground Controller had it taxi onto then off of T onto P5. She then instructed us to continue north on T and multiple times telling us we were instructed to hold short of R1; which we did and told her so. I recently taxied on T and purposely observed that Taxiway R1 has no marking sign or hold line on T.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.