---
type: "Bill"
title: "authorize temporary variable speed limits on state highways under certain circumstances."
description: "authorize temporary variable speed limits on state highways under certain circumstances."
jurisdiction: "us/states/sd"
legislature: "South Dakota Legislature"
session: "2020"
identifier: "SB 21"
citation: "South Dakota SB 21 (2020)"
classification: ["bill"]
subjects: ["Executive/Judiciary Request", "Motor Vehicles", "Speed Limits"]
status: "enacted"
primary_sponsors: []
version_count: 2
action_count: 15
vote_count: 4
first_action: "2020-01-14"
last_action: "2020-03-30"
source: "openstates"
source_identifier: "ocd-bill/2aa2b625-766d-43f5-836e-daa8439e957d"
source_url: "https://sdlegislature.gov/Legislative_Session/Bills/Bill.aspx?Bill=21&Session=2020"
source_hash: "d0fc9493310712e2b5a0940db6fead103af1d623b4f75f1a3a05ce0b780caacc"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-sd"]
---

# South Dakota SB 21 (2020) — authorize temporary variable speed limits on state highways under certain circumstances.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Introduced** (filed) — [source](https://sdlegislature.gov/Legislative_Session/Bills/Bill.aspx?File=SB21P.html&Session=2020&Version=Introduced&Bill=21)
2. **Enrolled** (enrolled) — [source](https://sdlegislature.gov/Legislative_Session/Bills/Bill.aspx?File=SB21ENR.html&Session=2020&Version=Enrolled&Bill=21)

## Votes

- Do Pass - 2020 — **55–10** (pass) · lower
- Do Pass - 2020 — **12–0** (pass) · lower
- Do Pass - 2020 — **6–1** (pass) · upper
- Do Pass - 2020 — **20–14** (pass) · upper

## Sponsors

- Transportation — primary (organization)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2020-01-14** First read in Senate and referred to Senate Transportation S.J. 11 `introduction, reading-1, referral-committee`
- **2020-01-24** Scheduled for hearing
- **2020-01-24** Transportation Do Pass, Passed, YEAS 6, NAYS 1. `committee-passage`
- **2020-01-27** Fiscal Note Requested, Passed S.J. 93
- **2020-02-18** Senate Do Pass, Passed, YEAS 20, NAYS 14. S.J. 241 `passage`
- **2020-02-19** First Reading House H.J. 315
- **2020-02-26** Referred to House Transportation H.J. 411 `referral-committee`
- **2020-03-03** Scheduled for hearing
- **2020-03-03** Transportation Do Pass, Passed, YEAS 12, NAYS 0. `committee-passage`
- **2020-03-04** House of Representatives Deferred to another day, Passed H.J. 477
- **2020-03-05** House of Representatives Do Pass, Passed, YEAS 55, NAYS 10. H.J. 495 `passage`
- **2020-03-09** Signed by the President S.J. 470
- **2020-03-11** Delivered to the Governor on March 11, 2020 S.J. 488 `executive-receipt`
- **2020-03-11** Signed by the Speaker H.J. 583
- **2020-03-30** Signed by the Governor on March 23, 2020 S.J. 558 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/2aa2b625-766d-43f5-836e-daa8439e957d`. Confidence: reported (aggregated from official South Dakota legislature records).