Vietnam has a variety of transportation options for travelers, including:

• Domestic flights: Domestic airlines in Vietnam offer frequent flights between major cities, including Hanoi, Ho Chi Minh City, Da Nang, and Nha Trang. Popular airlines include Vietnam Airlines, Vietjet Air, and Jetstar Pacific.

• Trains: Vietnam has a well-developed railway system, with trains connecting major cities and tourist destinations. There are several classes of trains, including soft sleeper, hard sleeper, and seat classes.

• Buses: Buses are a popular way to travel in Vietnam, with both public and private bus companies operating throughout the country. Some companies offer sleeper buses, which are equipped with bunk beds for overnight journeys.

• Taxis: Taxis are widely available in Vietnam, especially in major cities. It's best to use reputable taxi companies or ride-hailing apps like Grab or GoViet to avoid scams.

• Motorbikes: Motorbikes are a common mode of transportation in Vietnam, especially in urban areas. Tourists can rent motorbikes for a day or longer, but it's important to wear a helmet and drive defensively.

• Grab: Grab is a popular ride-hailing service in Vietnam that allows travelers to easily book rides from their smartphone app. It is available in many cities throughout the country, including Hanoi, Ho Chi Minh City, Da Nang, Nha Trang, and more.

• Cyclos and pedicabs: These are traditional forms of transportation in Vietnam, and can be found in tourist areas. Negotiate the price before getting in, and be prepared for a slower and less comfortable ride.

It's important to note that traffic in Vietnam can be chaotic and congested, especially in big cities like Hanoi and Ho Chi Minh City. It's recommended to use reputable transportation options and be cautious when crossing the street.

Please note that wearing a helmet became mandatory in Viet Nam for all motorcycle drivers and passengers on specific roadways, including national highways and other assigned routes.