Personal rapid transit

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Personal rapid transit (PRT), also known as podcar, is a type of public transportation mode that features small automated vehicles operating on a network of specially built guideways. PRT systems are designed to provide on-demand, non-stop transportation, offering a more flexible and efficient alternative to traditional mass transit systems.

History

The concept of personal rapid transit dates back to the mid-20th century. Early proposals and prototypes emerged in the 1960s and 1970s, with significant interest from urban planners and transportation engineers. However, due to technological and financial challenges, widespread implementation was limited.

Design and Operation

PRT systems typically consist of small, driverless vehicles that can carry a few passengers. These vehicles travel on a network of guideways, which can be elevated, at ground level, or underground. The guideways are designed to allow vehicles to bypass stations, enabling non-stop travel from origin to destination.

Vehicles

PRT vehicles are usually designed to accommodate 2 to 6 passengers. They are equipped with automated control systems that manage navigation, speed, and safety. The vehicles are often powered by electricity, making them an environmentally friendly option.

Guideways

The guideways in a PRT system are a critical component. They are designed to be lightweight and can be constructed in various environments, including urban areas. The guideways support the vehicles and provide the necessary infrastructure for automated control.

Stations

PRT stations are typically smaller and more numerous than those in traditional transit systems. They are designed to allow vehicles to enter and exit the main guideway without disrupting the flow of traffic. This design enables on-demand service and reduces waiting times for passengers.

Advantages

PRT systems offer several advantages over traditional public transportation:

• **On-demand service**: Passengers can request a vehicle at any time, reducing waiting times.
• **Non-stop travel**: Vehicles travel directly to the passenger's destination without intermediate stops.
• **Flexibility**: The network can be expanded or modified more easily than traditional transit systems.
• **Environmental benefits**: Electric-powered vehicles reduce emissions and energy consumption.

Challenges

Despite the potential benefits, PRT systems face several challenges:

• **High initial costs**: The construction of guideways and stations requires significant investment.
• **Technological hurdles**: Ensuring the reliability and safety of automated vehicles is complex.
• **Public acceptance**: Gaining public and political support for new transportation technologies can be difficult.

Examples of PRT Systems

Several PRT systems have been implemented or proposed around the world:

• Heathrow Airport in London, UK, features a PRT system known as ULTra (PRT), which connects the terminal with a parking area.
• Masdar City in Abu Dhabi, UAE, has a PRT system designed to provide sustainable transportation within the city.

Related Pages

• Automated guideway transit
• Mass transit
• Electric vehicle
• Sustainable transport
• Urban planning

See Also

• Automated people mover
• Light rail
• Monorail
• Public transport