gleis_neun
400 m trains set the curve; Interlaken's 1915 Aare bridges get 50 more years
BLS is rebuilding 1.7 km of track into Interlaken Ost and strengthening two listed 1915 riveted Aare bridges for 50 more years, all for 400 m InterCitys.
Castielerviadukt: the 84 m RhB bridge that gives a creeping mountain 75 cm of room
Bänziger Partner's 84 m composite viaduct for RhB rides 65‰ sliding bearings with a 75 cm reserve, 4,600 bolts and no field welds. How it was built.
Giving the Rhône 30 More Metres: Vaud and Valais Redraw 14 km of River
Vaud and Valais open the CHF 368m Chablais inquiry: 14 km of Rhône widened to 90 m, shared by three government levels and eight communes. Open to 2 Nov.
The ASTRA Bridge: a 260 m motorway that walked over its own building site
The 260 m, 1,250 t ASTRA Bridge moved 24 stages along the A2 near Arisdorf in 2026 and carried traffic over a daytime paving crew. A season-end look.
Mattertal Tunnel: when protecting a line costs half, move it into rock
MGBahn's Mattertal Tunnel moves the Täsch–Zermatt line into 4.1 km of rock. Its public display closes today, so here is how to weigh protecting against relocating.
What a bridge inspection can actually hear: Switzerland keeps its old bridges
Switzerland keeps over 10,000 ageing bridges rather than replacing them. After Carolabrücke, the variable that matters is detection probability, not interval.
Point Cloud Simplification: The Discipline of Honest Deletion
How rational decimation keeps a laser scan light and geometrically honest for scan-to-BIM — from Song & Feng curvature to GP-PCS, with a one-line Open3D check.
Zürich–Winterthur: the three-minute tunnel that is really buying a spare path
SBB's MehrSpur Zürich–Winterthur isn't buying three minutes but redundancy — and why usable possession hours, not spans, set a build's programme.
Infrastructure Systems Design: why the honest engineer solves the whole web at once
A PAZ foundation essay on Infrastructure Systems Design: coupled constraints, NSGA-II Pareto fronts, and why the honest engineer optimises cost, carbon and resilience together.
Two Clocks: Why the Grid, Not Your Building, Decides When You Open
The IEA's Electricity 2026 shows a five-to-fifteen-year grid clock behind every one-to-three-year build. On any electrical load, own the connection date.
