From the README[0]: > To improve the performance of download, I indexed ~3,000 cities with population larger than 100,000 people and stored into a very simple

From the README[0]: > To improve the performance of download, I indexed ~3,000 cities with population larger than 100,000 people and stored into a very simple protobuf format. [0] https://github.com/anvaka/city-roads https://github.com/anvaka/city-roads