...was where I took this set of images earlier this evening. The specific location was the railway bridge across the River Nidda in Frankfurt's western borough of Rödelheim, which is located just a few hundred metres down the line from the borough's station. As I'm typing this, the shower which the clouds forebode is just about to rain itself out.

Illustrating that peak hour traffic was getting into gear, the first service to come along was S 35354 on the S3 line, having come from Darmstadt Central Station and heading to Bad Soden. This was a triple unit, with 423 414 in the lead.

The track branching off to the right in the background is a bypass for the line through Frankfurt Western Station, passing over Mainzer Landstraße and eventually leading into Central Station itself. It is commonly called "Mainzer Landstraße Junction."

Next, S 35556 came in, working from Southern Station to Friedrichsdorf, with 423 382 in the lead.

And to complete the coverage of all suburban lines to come through here, 423 402 and company were working the S 35456 service from Langen to Kronberg on the S4 line.

There but also is the R15 regional line, working from Brandoberndorf to Bad Homburg during off-peak hours, and extending to Frankfurt Central Station at weekday peak hours. This line is operated by Hessische Landesbahn, using either class 609 VT 2 type DMUs as seen here, or class 648 LINT type DMUs. This was the HLB 24428 service which had departed Frankfurt Central at 5.31 pm. As you can see, these services use the Mainzer Landstraße junction, which but is also used for rerouting suburban trains in case of disruptions on the section via Western Station.