What is a Monorail? Which countries do they use?

What is a Monorail? Which countries do they use?
What is a Monorail?
The monorail is one of the city rail transportation types. As the name implies, the wagons move in the direction of departure or arrival, which is mono, hanging on or under a single rail. The rail system used in public transportation is carried out with two beams placed on a column and the rails on these two beams and the arrival and arrival are performed simultaneously.
Due to the low cost of the monorail and the short duration of the construction phase, it makes itself more advantageous than other transportation systems, especially Metro and Tram lines, which are used in urban passenger transportation, which are double-rail systems.
IMPORTANT CITIES USING MONORAY
Newark International Airport Monorail, United States
Seattle Center Monorail, USA
Tokyo Monorail, Japan
Metrail Hybrid Monorail, Malaysia
Shonan Monoray, Japan
Kuala Lumpur Monorail, Malaysia
Okinawa Monorail, Japan
Kitakyushu Monorail, Japan
Disneyland Monorail, USA
Palm Island Monorail, United Arab Emirates
Wuppertal Monoray, Germany
Moscow Monorail, Russia
Tokyo monorail care facility, Japan
Sentosa Express, Singapore
Las Vegas Monorail, USA