|Length:||4.2 km (2.6 mi)
A further 4.2 km is designated as the L 124
The primary function of the A 559, besides relieving traffic at the A 4 interchange, is to connect the Cologne-Bonn Airport to Cologne proper. The airport is along the A 59, one junction south of the A 559's southern terminus.
The section of road from the junction Köln-Vingst (just after the A 4) to the end of the freeway at Köln-Deutz is up to autobahn standards, but is only designated as the L 124. This stretch of road was signed at one time as the A 559, although the autobahn designation never officially covered the entire freeway.
|L 111||Road continues as the L 111 into Köln|
|(-)||Köln-Am Grauen Stein|
|(-)||4-way interchange Gremberg|
|(-)||3-way interchange Köln-Porz|