Highway
Major highways are often named and numbered by the governments that typically develop and maintain them. Australia's Highway 1 is the longest national highway in the world at over and runs almost the entire way around the continent. China has the world's largest network of highways followed closely by the United States of America. Some highways, like the Pan-American Highway or the European routes, span multiple countries. Some major highway routes include ferry services, such as U.S. Route 10, which crosses Lake Michigan.
Himachal Road Transport Corporation
Other than regular services connecting Himachal to Chandigarh, Delhi and Haridwar; HRTC operates buses on some of the highest motorable roads in the world. These routes include Leh-Delhi, Shimla-Kaza, Kullu-Kaza, Manali - Reckongpeo and others. The Leh-Delhi routes operated by HRTC is 1203 km long and is the longest route by any RTC in India with a travel time of approx. 35 hours. The roads to Kaza are also termed as the world's most treacherous roads.