The Houston district office of the Texas State Department of Highways and Public Transportation is presently responsible for the operation and maintenance of approximately 1,000 traffic signals within a six-county area. This number is expected to double within the next 5 years. The Texas Transportation Institute has begun the development of a microcomputer-based method of recording and analyzing traffic signal system maintenance records. Still under development, this system will eventually replace the manual method now used by signal maintenance personnel. The system will be based on the use of portable microcomputers and expert system software. An overview and benefits of the system as it is being developed are presented.