CTA breaks ground on Lawrence to Bryn Mawr Red Line Modernisation Project, US June 3, 2021 | North America News The Chicago Transit Authority (CTA) has started work on the Lawrence to Bryn Mawr Modernisation Project, which is part of CTA’s USD2.1 billion Red and Purple Modernization (RPM) Phase I Pro... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password