The Rodalies R8 Line runs from Martorell south of Barcelona to Granollers Centre in the north without going through the city centre.
The main purpose of this Barcelona Local Trains line is to provide a direct connection to the Universtat Autònoma de Barcelona and surrounding municipalities, such as Sant Cugat and Rubí, for travellers from less accessible towns inland from Barcelona.
I have included the stops on the R8 Rodalies line both as a graphic and text.
Please scroll down the page for information on train times on the R8 Martorell-UAB-Granollers Centre line.
As train times change seasonally, the best source of accurate timetables is the official RENFE Rodalies page.