2023 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to be considered–Limitation on removal from state trunk highway system

2022 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to be considered–Limitation on removal from state trunk highway system

2021 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to be considered–Limitation on removal from state trunk highway system

2019 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to beconsidered–Limitation on removal from state trunk highway system

2018 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to be considered–Limitation on removal from state trunk highway system

2016 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to beconsidered–Limitation on removal from state trunk highway system

2014 South Dakota Codified Laws 31-4-1. State trunk highway system designated by Legislature–Primary factors to beconsidered–Limitation on removal from state trunk highway system

2010 South Dakota Laws 31-4-1 – State trunk highway system designated by Legislature–Primary factors to be considered–Limitation on removal from state trunk highway system