The Noida Metro Rail Corporation NMRC, which operates the Noida-Greater Noida Metro, on Tuesday said it has invited feedback from public and service providers to improve commuters travel experience.For this, the NMRC has floated a questionnaire which will be available both online and offline at some key stations for feedback from May 25 to June 24, it said.NMRC said it has recently been assigned the status of nodal authority for mobility services in Noida and the Greater Noida region.