In tunnels and underground excavations. … tunnel entrance is called a portal.
Rail tunnels shorten the route length by allowing rail lines to pass through natural obstacles such as mountains and provide a means of crossing busy city areas without damaging or interfering with neighbourhoods.
Busch Double Track Tunnel Portal H0 scale
Faller Double Track Tunnel Portals for Steam and Cantenary Operation N scale
Faller Tunnel-Arch Profiles H0 scale
Noch ICE-Tunnel-Portal Double Track, HO scale, 58040
Barcode: 4007246580408
Noch Single Track Tunnel Portal N scale
Tunnel Portal Double Track, N scale, 34410
Barcode: 4007246344109
Rod's Accessories Rockface Tunnel Portal H0 scale
Woodland Scenics Tunnel Liner Form H0 scale