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Content: The danger of the road ironically made it a popular tourist destination starting in the 1990s, drawing some 25,000 thrill seekers. Mountain biking enthusiasts in particular have made it a favorite destination for downhill biking since there is a 64-kilometre (40 mi) stretch of continuous downhill riding with only one short uphill section. There are now many tour operators catering to this activity, providing information, guides, transport, and equipment. At least 18 cyclists have died on the ride since 1998. The road was built in the 1930s during the Chaco War by Paraguayan prisoners. The Yungas Road was modernized during a 20 year period ending in 2006. The modernization included enlarging the carriageway from one to two lanes, constructing asphalt pavement, and building a new section between Chusquipata and Yolosa, bypassing to the north one of the most dangerous sections of the old ‘Death Road’. This new route features modern construction (bridges, drainage, etc.), multiple lanes, pavement, guardrails, and many other elements that make it considerably safer than the original route. The original North Yungas Road is currently much less used by traffic, although an increasing number of adventure travelers bike it for the thrills.