Metra is asking passengers to behave themselves as the campaign called "Ride Nice" returns this summer. View Full Caption Metra

BEVERLY — Smelly food, uncovered coughing and sneezing, saving seats for imaginary friends and being part of a rowdy group are among the top gripes of Metra riders in a recent survey.

The commuter rail agency unveiled the list of complaints Monday as it announced the return of its “Ride Nice” courtesy campaign. The effort aims to promote good manners among riders and follows an effort in July by the same name.

Then, riders complained of fellow passengers putting their feet on seats, talking loudly on cellphones, "manspreading" and even trimming nails and beards while on board.

The latest grievances will be included in a series of onboard posters that will be featured this summer. Other complaints from the survey taken last month include commuters pretending to be asleep to avoid moving bags and other belongings, snoring loudly, littering, clogging the aisles and kneeing the seats in front of them.

The humorous posters are designed to remind customers of how their behavior might affect fellow passengers, according to Metra.

“We hope our customers will enjoy the new posters as much as the previous ones,” said Don Orseno, Metra's chief executive officer.

Metra provides service to and from Downtown Chicago with 241 stations over 11 routes totaling nearly 500 route miles and about 1,200 miles of track. The rail service operates more than 700 weekday trains, providing about 300,000 passenger trips each weekday.