She says Transport Minister John Robertson saysneeds to quickly find a solution to the problem.
"Gosford Greens Councillor Terri Latella contacted me to gain support for residents living near Gosford station seeking assistance with the noise pollution that they are suffering," Ms Rhiannon says.
"It is unacceptable that this night time noise continue, which is reportedly loud enough to penetrate houses already sound-proofed against activities on the rail line."
Ms Rhiannon raised the issue in State Parliament, asking Mr Robertson if he was aware of the issue and if action is being taken.
Mr Robertson says train horns play a role in warning passengers and rail workers of potential risks.
"I am aware that residents close to Gosford station have complained about an increase in horn usage at Gosford stabling yard," he told Parliament.
"In response to the complaints I have asked RailCorp to review its use of horns in Gosford.
"I am advised that RailCorp has met with affected residents and is examining ways to reduce the noise impact of stabled trains.
"I am comfortable for RailCorp to look at further options to minimise noise in Gosford as long as safety standards are upheld."
