Doyle & Associates

Quandel Consultants LLC is a Chicago-based and employee-owned professional engineering firm that specializes in enhancing rail corridors and implementing improved passenger and freight rail services for federal, state, and local governments. With four decades of experience, the firm provides comprehensive services including program project management, planning, engineering, operations, and construction management across a variety of transportation system projects. Quandel's expertise encompasses all phases of rail corridor planning and development, from early feasibility studies to final engineering. Their portfolio features a range of projects, such as the Chicago to Quad Cities Grade Crossing Design and the Chicago-St. Louis High-Speed Rail Project, showcasing their commitment to advancing transportation infrastructure. Generated from the website