From Kelheim in Southern Germany to Sulina on the Romanian Black Sea coast, and hence on a length of 2,414.72 kilometres, the international Danube waterway is spanned by a total of 130 bridges. More than a further 180 are located along the 430-kilometre-long upper reach of the Danube from Donaueschingen to Kelheim.

On the upper Danube (Kelheim–Gönyű), the river is crossed by a bridge every seven kilometres on average. On the middle reach of the Danube (Gönyű–Turnu-Severin), the average distance between bridges is 27 kilometres, while on the lower Danube (Turnu-Severin–Sulina) the distance is 155 kilometres.

Section	Length of    section	Number of    bridges	Bridge density (length / bridges)
Upper Danube (Kelheim—Gönyű)	624 km	88	7.1 km
Middle Danube (Gönyű—Turnu-Severin)	860 km	32	26.9 km
Lower Danube (Turnu-Severin—Sulina)	931 km	6	155.2 km
Danube waterway (Kelheim—Sulina)	2,415 km	126	19.2 km

The » List of Danube Bridges, which is published by via donau, contains a table with navigation-relevant parameters of 126 existing and four currently constructed bridges spanning the Danube along the section from Kelheim to Sulina. These parameters include location (river-km), vertical clearance at highest navigable water level (HNWL), horizontal clearance at low navigable water level (LNWL), reference gauges, number of passageways and allowed direction of passage.