The Burlington Northern Santa Fe Railway is performing federally mandated upgrades to its signal system on the rail line from Lisle to Hinsdale.
The railroad company is installing the Positive Train Control System, intended to improve safety by having real-time monitoring and the capability of controlling train speed and braking from a remote location. The system is a safeguard against operator error.
Brief delays at the Prospect Avenue crossing in Clarendon Hills and the Stough Street crossing in Hinsdale may occur when gates are down as new software is tested.
Residents who live near those crossings also may notice the sound of more train horns, as federal law requires trains to sound their horns whenever workers are present.
The signal upgrade periods are scheduled from 8:30 a.m. to 4:30 p.m. Friday and 7:30 a.m. to 6:30 p.m. Saturday and Sunday.