Between Dříteč and Vysoká n. L. near Hradec Králové, take extra care when riding on the busy road.
Between the Les Království dam and Hostinné, take extra care when riding on the busy roads 299 and 325.
Vrchlabí - Špindlerův Mlýn: in the main tourist season (June-September) you can use the Krkonoše Cycle Buses (green line) otherwise you must use the busy road 325 from Vrchlabí to Špindlerův Mlýn.