Angus and Margaret MacKay died in September's accident
The public are being asked for their views on how safe they feel when using gate-free railway level crossings.
SNP MSP Dave Thompson said the results of his survey will be passed to Transport Minister Stewart Stevenson.
His consultation exercise follows the deaths of three people whose car was in a collision with a train at a crossing in Caithness in September.
Train driver members of the Aslef union have been reducing speeds at gate-free crossing since the accident.
Mr Thompson has been calling for all sites to be fitted with barriers.
He said: "I have campaigned for a number of years for improved safety at open crossings and, following a positive meeting I had recently with the transport minister, wish to strengthen the case for barriers at all open level crossings in Scotland.
"Therefore I am keen to hear the public's views on the matter. Whether they feel crossings are safe as they are or needing barriers installed I hope that everyone will take the time to give me their input."
Angus MacKay and his wife Margaret and Mr MacKay's brother Donald were killed in September's accident at Halkirk.
The Liberal Democrats called for assurances over safety at crossings not fitted with barriers earlier this month.