Swingnose crossing

moveable point frogs
A swingnose crossing or moveable point frog is a device used at a railway turnout to eliminate the gap at the common crossing (a.k.a. frog) which can cause damage and noise.wikipedia
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Railroad switch

pointsswitchcrossover
A swingnose crossing or moveable point frog is a device used at a railway turnout to eliminate the gap at the common crossing (a.k.a. frog) which can cause damage and noise.
If the frog angle is so shallow that a fixed frog cannot support a train's wheels, a swingnose crossing (US: moveable point frog) will be used.

Passenger rail terminology

Heavy railsteam railroadheavy-rail
Swingnose crossings are also useful where heavy rail and light rail vehicles, which have different wheel profiles, share the same track.

Light rail

light rail transitlight-railLRT
Swingnose crossings are also useful where heavy rail and light rail vehicles, which have different wheel profiles, share the same track.

Axle load

axleloadaxle loadingaxle loads
Swingnose crossings would be used for V-crossings finer than about 1 in 20, and for axle loads in excess of 25 tonnes.

Tonne

ttonnesmetric ton
Swingnose crossings would be used for V-crossings finer than about 1 in 20, and for axle loads in excess of 25 tonnes.

Point machine

point motorswitch machineswitch machines
This may require excessive effort for manual operation, and require a point motor.

Double junction

diamond crossingsingle lead junctiondiamonds
A switched diamond is a diamond crossing in which the fixed frogs are replaced by moveable frogs.

High-speed rail in France

LGVLignes à Grande VitesseLGVs
Every LGV set of points incorporates a swingnose crossing (coeur à pointe mobile or 'moveable point frog'), which eliminates the gap in rail support that causes shock and vibration as wheels of a train pass over the 'frog' of conventional points.

Shinkansen

bullet trainbullet trainsJapanese bullet train
Continuous welded rail and swingnose crossing points are employed, eliminating gaps at turnouts and crossings.

Waghäusel Saalbach–Graben-Neudorf railway

Waghäusel Saalbach–Graben-Neudorf
Their length is 154 m and their weight (including the concrete sleepers) is 210 t. The point blades are 40 m-long, the moveable point frogs are 15 m long.

Berlin–Halle railway

Anhalt RailwayBerlin–HalleAnhalter Bahn
During the remodelling of Muldenstein station, moveable point frogs were inserted into the continuous track at the northern end of the station.