The Iowa Department of Transportation — One Stop Permit is a secure, online system designed to make it easier for businesses to obtain all of their necessary permits from a single source. The system provides access to multiple permits from one application, including permits for oversize/overweight vehicles, bridge work, and hazardous materials. It also provides access to a variety of other services, such as vehicle registration, driver’s license renewal, and vehicle title transfers. The One-Stop Permit system offers three different types of permits: • Oversize/Overweight Permit: This permit allows vehicles to exceed the legal size and weight limits. • Bridge Work Permit: This permit allows for the construction and maintenance of bridges. • Hazardous Materials Permit: This permit allows for the transport of hazardous materials.