Only singles are legal in U.S., however, the sections are longer. Don't know about seating capacity as that depends on the configuration that is ordered (bench seats, bench seats only along walls with big standing area in middle, bucket style seats {narrow or wide}, and
how many wheel chair mounts.) Note in photo, that it is a trolley bus with trolley poles on
rear segment (hence only rear segment wheels are powered) and driver in front segment that
has to keep rear segment under the wire.