The following speed limits are established in Iowa Code § 321.285 and any speed in excess thereof is unlawful unless specifically designated otherwise in this chapter as a special speed zone.
District | Speed Limit | Iowa Code Section |
Business district | 20 mph | § 321.285(1) |
Residence or school district | 25 mph | § 321.285(2) |
Suburban district | 45 mph | § 321.285(4) |
(1999 Code, § 63.02)