Chapter 131 - SIGNING ON PRIMARY HIGHWAYS
- Rule 761-131.1 - Destination signs at an intersection
- Rule 761-131.2 - Erection of signs for numbered business routes
- Rule 761-131.3 - Erection of signs for schools
- Rule 761-131.4 - Erection of camping service signs on interstate highways
- Rule 761-131.5 - Erection of signs for sanitary landfills
- Rule 761-131.6 - Erection of signs for special events
- Rule 761-131.7 - Erection of signs for organized off-highway camps
- Rule 761-131.8 - Erection of signs for county conservation parks
- Rule 761-131.9 - Erection of no parking signs
- Rule 761-131.10 - Signing for named routes and memorial bridges
- Rule 761-131.11 - Signing for Iowa medal of honor highway
- Rule 761-131.12 - Reserved
- Rule 761-131.13 - Reserved
- Rule 761-131.14 - Reserved
- Rule 761-131.15 - Information and address