The New Paper Panel reviewing whether cyclists should ride only in single file Cyclists have to ride in a single file only while on single-lane roads or in bus lanes during bus lane hours, but they can ride two abreast on roads with more than one lane. TNP FILE PHOTO It is also looking at whether to cap group sizes of road cyclists, says Chee Hong Tat 0 Engagements A panel reviewing rules governing on-road cycling is studying whether cyclists should be required to ride in a single file at all times, or if there should be limits on group sizes for cyclists.