1. Singapore: Singapore is widely regarded as a leader in smart transportation systems. It has implemented various technologies such as electronic tolling, real-time traffic monitoring, and an extensive sensor network to optimize transportation efficiency.

2. The Netherlands: The Netherlands is known for its advanced smart transportation infrastructure, including intelligent traffic signal systems, electric vehicle charging networks, and integrated mobility platforms.

3. South Korea: South Korea has made significant strides in smart transportation, with initiatives like autonomous shuttles, smart traffic management systems, and the integration of various transportation modes through mobile apps.

4. United States: Several cities in the United States, such as San Francisco, Seattle, and New York, have been at the forefront of developing smart transportation systems. These include the use of ride-sharing platforms, electric vehicle infrastructure, and traffic management technologies.

5. Japan: Japan has invested heavily in smart transportation systems, leveraging technologies like connected cars, intelligent transportation systems, and integrated mobility platforms.

6. Germany: Germany is focusing on developing smart transportation infrastructure, including electric vehicle charging networks, digital traffic management, and smart parking solutions.

7. United Kingdom: The UK has been actively implementing smart transportation technologies, particularly in cities like London. Initiatives include congestion pricing, electric vehicle incentives, and intelligent traffic management systems.

8. China: China has been a leader in smart transportation, with initiatives like intelligent traffic control systems, extensive bike-sharing programs, and the development of autonomous vehicles.

9. Sweden: Sweden is known for its commitment to sustainable and smart transportation solutions. It has implemented initiatives such as electric vehicle infrastructure, smart public transportation systems, and autonomous vehicle testing.

10. France: France has been increasingly investing in smart transportation systems, including electric vehicle infrastructure, intelligent traffic management, and smart parking solutions in cities like Paris.