British band Coldplay opened a four-night run at Toronto’s new 50,000-seat Rogers Stadium on Monday, offering the first real test of crowd-control changes promised after fans at the venue’s inaugural concert last week reported exit delays of up to two hours. Operator Live Nation Canada added traffic marshals, clearer signage, extra water stations and a “pulsation” system that releases spectators in waves toward three subway stops instead of funneling everyone to nearby Downsview Park station. The Toronto Transit Commission boosted staffing at Downsview Park and Wilson stations, while Metrolinx monitored GO-train demand. Early reports suggested the measures eased congestion: some attendees cleared the grounds in about 10 minutes, although others still faced hold-and-release waits of roughly 40 minutes and complained about the long walk to the remote Downsview Park site. Monday’s show began 25 minutes late because of a lighting-tower glitch and ran 15 minutes past the 11:00 p.m. curfew. Coldplay front-man Chris Martin thanked fans for enduring “traffic, trains and waiting” to reach what he called “this weird stadium in the middle of nowhere.” The band returns to Rogers Stadium tonight and again on Friday and Saturday.