Building work:
Work began:	23 July 1997
Emplacement of sub-Spree segments:	27 March 1999
Completion of structural work:	December 2000
Completion:	DDecember 20011
Technical details:
Total length of the system:	495 m (285 m und 210 m)
Number of tunnel segments:	17
Headroom:	app. 4.20 m
Width of road:	6.50 m
Interior width of tunnel:	8.10 m
Exterior width of tunnel:	12.00 m
Thickness of structure	1 m
Fireproof bulkheads:	4
Watertight bulkheads:	3
Weight of watertight bulkheads (Paul Löbe House and Marie Elisabeth Lüders House):	12 t
Weight of watertight bulkhead (Jakob Kaiser House):	16 t