Master's thesis process construction technology preparation and implementation of project "Tyršův Bridge" in Litomerice. Because condition of bridges is very poor, it was decided to reconstruction them. This is a design for reconstruction of bridges, roads and road-bed on the system of Tyršův Bridge in Litomerice to the extent of the diploma work. During the reconstruction will replace bridges registration no. 15-040 and 15-041 new ones of the same lightness, on the bridge registration no. 15-042 will be replaced roadway and bridge ev.č. 15-043 will be replaced and the structure of the supports. Will be extended road-bed between bridges registration no. 15-040 and 15-041 using gabion construction.