The links below lead to complete sets of standard Signal Aspects and Indications in use by the railroads as of the dates listed. Each image is a "jpg" file reproduced directly from the original operating rule book of the company and effective date listed.
This site is intended as an historical reference for those interested in railroad signaling and traffic control practices. The individual pages are designed so that each can be printed on one 8 1/2 x 11 inch page of paper*. In some cases the pages have been optimized using graphics modification programs to lessen their file size. The original pages were generally about 3 x 5 inches in overall area. Some of the source material is almost 100 years old and the pages may show some defects due to age and wear.
*Users are free to download and copy items herein for non-commercial purposes; please identify this as the source site in reference work and public communication.