https://www.google.com/search?q=ukršteni prelaz&oq=ukršteni ...

http://en.wiktionary.org/wiki/scissors_crossover

U pitanju su skretnice
Pogledati sl. 1 ovde i uporediti sa definicijama navedenin u produžetku:
http://www.scribd.com/doc/62311498/železnička-postrojenja
11.3.SKRETNICA
Skretnica predstavlja deo kolosečnog postrojenja na kome su moguće sve vrste ugrožavanja.Stoga se na skretnici dovodi i sa nje prikuplja veći broj podataka i obrađuje u logičkim kolimasignalno-sigurnosnih uređaja. Skretnica je deo puta na kojem se vrši izbor pravca kretanja, odnosno promene pravca ili izbor koloseka.
Prema načinu njihovog povezivanja sa kolosecima mogu biti:
-jednostruke (proste),
-dvostruke,
-dvojne ukrsne skretnice (engleske),
-proste ukrsne skretnice (poluengleske),
-ukrštaji,
-upletene itd. (slika 1.)

Pogledati sliku ovde:
http://techportal.eere.energy.gov/technology.do/techID=275
A scissors crossover provides flexible mobility for train cars between parallel tracks. LANL is pursuing a design to allow flexible and efficient movement of data in scalable computer systems.

http://en.wikipedia.org/wiki/Railroad_switch#Switch_diamond
A scissors crossover: two pairs of switches linking two tracks to each other in both directions

http://www.tfode.com/scissors_crossover
scissors crossover
Two pairs of switches that cross over between two parallel train tracks forming an X.

There is a double/scissors/diamond crossover just before this station. Arriving trains discharge and board on the same track, going over the crossover either when entering or leaving. When the next train arrives, your train leaves. [1]
Often, the adjacent platform track is used but it must be kept free of other trains. Sometimes a scissors crossover is used.[2]
the chartered train managed to go from eastbound on the Bloor-Danforth line to northbound on the Spadina line by running up the connection to the University line just east of Spadina station, running through St. George station, and stopping just east of the station to reverse direction and take the scissors crossover to the northbound track. ...Once the train cleared the scissors crossover, Transit Control was notified and the switch flipped. [3]
Synonyms diamond crossover