VgF U5

 From Frankfurt am Main, and their excellent U-Bahn, which is actually a tram metro. The system uses highfloor trams from the Flexity Swift family as well as a custom made tram known as the U4. Original U1 trains are long gone, but the U2 and U3s did serve in the San Diego Trolley after their recent retirement. P, Pt and PtB trams used to run up untill around 2017 and the oldest rolling stock, Block 1 U4's, are approaching 35 years old. Overall, the system is now very modern, and carries many Frankfurters per day. Here is the U5 in all of its variants, of which some lack driving cabs and function solely as intermediate carriages in rakes, which range from 2 to 8 cars long, or 1 to 4 trams long, with planned extension to 5 trams in length on the U8.

Notes:

Possible arrangements include

U5-25 (Line U9)

U5-25, U5-25

U5-50+U5-50 (this is one single 4 car train never split in service, only at yards)

U5-25, U5-25, U5-25

U5-25, U5-50+U5-50

U5-25, U5-25, U5-25, U5-25

U5-25, U5-50+U5-50, U5-25

U5-50+U5-KR+U5-50 (This formation is called a U5-75 as it is 75m long)

U5-25, U5-50+U5-KR+U5-50

U5-50+U5-KR+U5-KR+U5-50 (This formation is called a U5-100 as it is 100m long)

U5-50 Batch 2 (only one cab) - Number 804

U5-50 Batch 2 (only one cab) - Number 803

U5-50 Batch 1 (only one cab) - Number 802

U5-25 Batch 1 (2 cabs) - Number 601

U5-KR (Kiene Richtung, German for No Direction as it has no cabs and functions as an intermediate unit coupled to U5-50s) - No. 755

U5-KR (Kiene Richtung, German for No Direction as it has no cabs and functions as an intermediate unit coupled to U5-50s) - No. 751