Question 6: Riding in a row of three isn't allowed.

TRAFFIC RULES
It's estimated that thousands of people lose their lives each year in Vietnam because of road traffic accidents. In order to decrease the number of traffic crashes, it's essential to know and obey traffic rules. Here are some of them.
For pedestrians
Walk on the right-hand side of the road if there is no pavement.
Cross the road at the zebra crossing or pedestrian bridge.
Look around and listen for traffic before crossing.
Don't run when crossing the road.
For cyclists
Ride in a bicycle lane or on the right-hand side of a single lane road.
Ride to the right of any oncoming vehicle.
Use a hand signal before you turn.
Don't ride in a row of two, three or more.
Don't lead an animal or hold on to a moving vehicle while riding a bicycle.
For motorists and drivers
Only drive when you are at least 18 years old and have a driving licence.
Ride or drive within the speed limit.
Do not park near or at any zebra crossing, on a footpath, or near a traffic light.
Give a signal before turning or changing lanes. Use your horn to alert others.
Keep a safe distance between you and other vehicles.
Slow down when you are near any intersections.