Norfolk Southern, a major freight railroad company, has announced a new agreement with unionized track maintenance workers that will provide them with four paid sick days a year and removes a stipulation that required 48-hour notice before taking personal days. The agreement follows a derailment of one of its trains earlier this month and is part of the company's commitment to improving the quality of life of its workers. Negotiations are also underway to offer paid sick leave to other unionized workers, such as locomotive engineers and conductors.