As previous members said: this is quite common here in the Netherlands. These kind of constructions can be found all around the country. For example just the line between Zwolle and Leeuwarden has four of those bridges without overhead wires, or the section Zaandam to Purmerend has three of them. There are also a few between Roosendaal and Vlissingen, between Leiden and Schiphol Airport, Leiden and Utrecht Centraal and Alkmaar and Den Helder.
Another well known line was the line between Hoek van Holland and Rotterdam, but with its conversion from train to metro line, I believe that the non-wired bridges are now all fully wired.
A bit depending on the train type, but all trains can simply coast over the 'wireless' sections, but on our newer trains (our SLT and SNG train types) the main circuit breaker might open in some cases, which takes a bit of time to close and start all systems again. We try to avoid that by using the ED-brakes to generate just enough power to prevent the MCB from opening, but on low speeds, that's obviously not really possible. Even though it is not necessary on other trains, we do it with basically all trains that support ED-braking to prevent systems that rely on the high voltage from temporarily shutting down.
Most gaps are very easy to pass because they are taken at line speed, but there are a few places that are a bit more tricky. The one mentioned earlier, at Akkrum, is just behind the station, so it is necessary to accelerate quite quickly there. Another one is at Alkmaar, which has two level crossings on each side on the bridge. Combined with the very low maximum speed of 40 km/h at that point, this place is a quite the challenge when people are stupid enough to crawl under the lowered level crossing barriers. The train might stop at just the wrong point, with the pantographs just inside the gap section. There is a quite famous picture on the internet where some people are pushing a double deck train back under the wires at that place.
