NAIROBI, Dec. 29 (Xinhua) -- Roads built by Chinese firms nowadays are sprawling across Africa, reforming the transport in African cities and greatly improving the flow of traffic.

These roads, including those already built and others still under construction over the years, have totaled more than 5,200 km in length, according to data from the Chinese government.

The roads, as some African leaders say, have become the modern symbols of China-Africa friendship.

Following is a list of some road projects undertaken by Chinese firms in Africa in recent years.

1. Northern main road (MR 129), Namibia

Photo shows Namibia's northern main road (MR 129) between Omafo in the Ohangwena Region and Outapi in the Omusati Region. Construction of the road by China Gezhouba Group Corporation began on May 15, 2013, with a total cost of 80 million U.S. dollars. (Xinhua file photo/Wang Yonghui)

2. "Spaghetti" road, Botswana

Photo shows part of the interchange that Chinese firm, China Railway Seventh Group Botswana Ltd has constructed in Botswana. The interchange, popularly known here as the spaghetti because of its design, is expected to ease congestion of traffic in Francistown, some 430km northeast of the capital, Gaborone. (Xinhua/Shingirai Madondo)

3. Antananarivo-Ivato International Airport road, Madagascar

Photo taken on Nov. 12, 2016 shows a Chinese-built road which links Madagascar's capital Antananarivo and the road to the Ivato International Airport in Madagascar. (Xinhua/Wen Hao)

4. Nairobi Eastern & Northern Bypass, Kenya

Photo shows vehicles run along the Nairobi Eastern & Northern Bypass, constructed by China Road and Bridge Corporation (CRBC) in Nairobi, capital of Kenya, Sept. 26, 2012. (Xinhua/Ding Haitao)

5. Kigali urban road upgrading project, Rwanda

Photo taken on May 2, 2017 shows the construction site of an urban road upgrading project carried out by Chinese firm, China Road and Bridge Corporation in Kigali, capital of Rwanda. (Xinhua/Lyu Tianran)

6. Kigamboni Bridge in Dar es Salaam, Tanzania

Photo shows two boatmen looking at the Chinese-built Kigamboni Bridge in Dar es Salaam, Tanzania, on April 19, 2016. (Xinhua/Pan Siwei)