2011. 06. 30..
Constructed by Colas Út, the Szigetszentmiklós branch of the Csepel ridge-road starts at the interchange of road 51101 and motorway M0 and reaches road 5101 at a roundabout through the agricultural lands of Szigetszentmiklós and Halásztelek. The lane configuration is 2×1 but it can be extended to 2×2. The interchange of road 51101 and motorway M0 is also being reconstructed into a 35 m diameter roundabout.