After the electrification of the Stuttgart-Weil section of the city, steam locomotives were initially used on the remaining section between Weil der Stadt and Calw.
Class VT 98 rail buses, which are similar to Uerdingen railbuses, were also used from 1953 and these took over all the services on the line a few years later.
The second track was removed between Calw and Althengstett in 1963.

Passenger traffic ended in 1983.
Deutsche Bundesbahn sought legal permission to close freight operations on this section on 16 July 1986.
The volume of traffic was estimated at that time to be 220 wagons per year, while the investment required to maintain operations on the line was approximately DM 1 million.
In 1988, freight traffic was closed as the result of a landslide in the Forst Tunnel near Althengstett.
The track work fell into disrepair, and the line was formally closed, with effect from 1 September 1995.
The track work of this section is protected as a monument and is still dedicated to operation as a railway.

The efforts of a society founded in December 1987, Verein zur Erhaltung der Württembergischen Schwarzwaldbahn ("Association for the preservation of the Württemberg Black Forest Railway", WSB, called since 2009 Verein Württembergische Schwarzwaldbahn Calw–Weil der Stadt, "Association for the Württemberg Black Forest Railway Calw-Weil der Stadt") led to the purchase of the section through the Calw district in 1994.
In order to legalise the transfer of the line, Deutsche Bahn abandoned it for public transport purposes on 31 August 1995 and it appears in the list of disused lines of the Federal Railway Authority (Eisenbahnbundesamt).
With the same date of effect (1 September 1995), the state of Baden-Württemberg granted the Calw district, at its request, a concession for the operation of a non-public access railway for 20 years (a decision of the state Ministry of Transport, dated 22 August 1995).
As a result, rail operations can be formally resumed as soon as the line is made operational.
After the electrification of the Stuttgart-Weil section of the city, steam locomotives were initially used on the remaining section between Weil der Stadt and Calw. Class VT 98 rail buses, which are similar to Uerdingen railbuses, were also used from 1953 and these took over all the services on the line a few years later. The second track was removed between Calw and Althengstett in 1963.
Passenger traffic ended in 1983. Deutsche Bundesbahn sought legal permission to close freight operations on this section on 16 July 1986. The volume of traffic was estimated at that time to be 220 wagons per year, while the investment required to maintain operations on the line was approximately DM 1 million. In 1988, freight traffic was closed as the result of a landslide in the Forst Tunnel near Althengstett. The track work fell into disrepair, and the line was formally closed, with effect from 1 September 1995. The track work of this section is protected as a monument and is still dedicated to operation as a railway.
The efforts of a society founded in December 1987, Verein zur Erhaltung der Württembergischen Schwarzwaldbahn ("Association for the preservation of the Württemberg Black Forest Railway", WSB, called since 2009 Verein Württembergische Schwarzwaldbahn Calw–Weil der Stadt, "Association for the Württemberg Black Forest Railway Calw-Weil der Stadt") led to the purchase of the section through the Calw district in 1994. In order to legalise the transfer of the line, Deutsche Bahn abandoned it for public transport purposes on 31 August 1995 and it appears in the list of disused lines of the Federal Railway Authority (Eisenbahnbundesamt). With the same date of effect (1 September 1995), the state of Baden-Württemberg granted the Calw district, at its request, a concession for the operation of a non-public access railway for 20 years (a decision of the state Ministry of Transport, dated 22 August 1995). As a result, rail operations can be formally resumed as soon as the line is made operational.
Black Forest Railway (Württemberg)