AASHTO DCRT-1, Technical Manual for Design and Construction of Road Tunnels—Civil Elements, June 2010 Edition, provides technical guidance for planning, designing, and constructing road tunnels. Opening chapters address planning, geometrical configuration, geotechnical investigation, and the geotechnical report, including tunnel shape and internal elements, classes of roads and vehicle sizes, traffic capacity, and alternative analyses. Construction chapters cover cut-and-cover tunnels, rock tunneling, soft ground tunneling, difficult ground tunneling, the sequential excavation method, tunnel lining, immersed tunnels, and jacked box tunneling. A dedicated chapter treats seismic considerations for road tunnels. Further chapters address construction engineering, geotechnical and structural instrumentation, and tunnel rehabilitation. Tunnel planners, designers, and construction engineers in highway agencies and their consultants can use the manual on road tunnel projects.