Norabide bakoitzak bere tunela dauka, 2.345 metrotakoa. Tunel bakoitzeko sekzioa, berriz, 86 m2-koa da. TUnelak oso zuzenak dira.
Izena zeharkatzen duen parajeak ematen dio, Gallastegi eta Gallastegitorre, hain zuzen. Tunelaren erdibidean Soraluze eta Bergara udalerrien arteko muga dago.
Mapa kargatzen...
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Tunelak egiteko zulaketa eta leherketak erabili izan ziren.
Gangaren barruko geruza egiteko 15x15x4 sarea jarri zuten, eta haren gainean porlan umela jaurti zuten. Porlanaren zabalera lurraren kalitatearen araberakoa eman zioten.
Aldeko puntu asko zituen: 24 orduko zaintza, langileen maila, errai zabalak, matxurentzako esparruak, argiteria, sutearen kontrako neurriak, gidarien informazio sistemak eta, behar izan eta gero, aginte-postua eta erreskate taldeen arteko koordinazioa.
Dena dela, eta EuroTAP 206-en arabera, langileek trebatzeko noizbehinkako ikastaroak beharko lirateke; gainera, osagai arriskutsuen garraioa libre da, ez dauka inolako arautegi berezirik.