Western arrivals in Russia have this as standard. St Petersburg was using old Ladas with a portable flashing light plonked on the roof until recently, using their car left and right indicators approaching each turn on the taxiway, but have replaced them with something newer.
I understood this was to maintain full control of everyone on the taxiways and ramp. Western aircraft crews don't speak Russian, and ground vehicles, tankers, etc have drivers who don't speak English, so to keep full awareness commands are given in Russian via the Follow Me driver.
St Petersburg's airside information says that this is the standard taxi control system (last line here).
Aerodrome - Pulkovo Airport (Saint-Petersburg)