---
type: "Bill"
title: "Autonomous truck-mounted attenuators; pilot program authorized."
description: "Department of Transportation; autonomous truck-mounted attenuators; pilot program authorized. Authorizes the Department of Transportation to establish a pilot program for the implementation and deployment of autonomous truck-mounted attenuators within mobile work zones, defined in the bill. The bill has an expiration date of December 31, 2031. This bill is identical to HB 582."
jurisdiction: "us/states/va"
legislature: "Virginia General Assembly"
session: "2026"
identifier: "SB 320"
citation: "Virginia SB 320 (2026)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Kannan Srinivasan"]
version_count: 3
action_count: 29
vote_count: 5
first_action: "2026-01-13"
last_action: "2026-04-06"
source: "openstates"
source_identifier: "ocd-bill/a8fe5c2d-a801-4908-8b2d-d1a68446f761"
source_url: "https://lis.virginia.gov/bill-details/20261/SB320"
source_hash: "5e4072b210ad6b3884ca314acd14f013f53b883264cbb716d829b3eb016cb697"
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-va"]
---

# Virginia SB 320 (2026) — Autonomous truck-mounted attenuators; pilot program authorized.

Department of Transportation; autonomous truck-mounted attenuators; pilot program authorized. Authorizes the Department of Transportation to establish a pilot program for the implementation and deployment of autonomous truck-mounted attenuators within mobile work zones, defined in the bill. The bill has an expiration date of December 31, 2031. This bill is identical to HB 582.

## Version chain

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

1. **Introduced** (filed) — [source](https://lis.blob.core.windows.net/files/1088898.PDF)
2. **Chaptered** (committee substitute) — [source](https://lis.blob.core.windows.net/files/1216689.PDF)
3. **Enrolled** (enrolled) — [source](https://lis.blob.core.windows.net/files/1188237.PDF)

## Votes

- Reported from Transportation — **15–0** (pass) · upper
- Passage R — **40–0** (pass) · upper
- H VOTE: — **96–0** (pass) · lower
- Reported from Transportation — **21–0** (pass) · lower
- Constitutional reading dispensed R — **38–0** (pass) · upper

## Sponsors

- Kannan Srinivasan — primary (person)

## Timeline

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

- **2026-01-13** Prefiled and ordered printed; Offered 01-14-2026 26104805D `filing, introduction`
- **2026-01-13** Referred to Committee on Transportation `referral-committee`
- **2026-01-22** Reported from Transportation (15-Y 0-N) `committee-passage`
- **2026-01-26** Constitutional reading dispensed (on 1st reading) (38-Y 0-N 0-A)
- **2026-01-26** Passed by for the day (Voice Vote)
- **2026-01-26** Constitutional reading dispensed (on 1st reading)
- **2026-01-26** Read first time `reading-1`
- **2026-01-26** Fiscal Impact Statement from Department of Planning and Budget (SB320)
- **2026-01-26** Passed by for the day
- **2026-01-26** Passed by for the day
- **2026-01-27** Read second time `reading-2`
- **2026-01-27** Engrossed by Senate (Voice Vote)
- **2026-01-28** Read third time and passed Senate (40-Y 0-N 0-A) `passage, reading-3`
- **2026-02-04** Placed on Calendar
- **2026-02-04** Read first time `reading-1`
- **2026-02-04** Referred to Committee on Transportation `referral-committee`
- **2026-02-24** Reported from Transportation (21-Y 0-N) `committee-passage`
- **2026-02-26** Read second time `reading-2`
- **2026-02-27** Read third time `reading-3`
- **2026-02-27** Passed House (96-Y 0-N 0-A) `passage`
- **2026-03-04** Enrolled `enrolled`
- **2026-03-04** Bill text as passed Senate and House (SB320ER) `passage`
- **2026-03-04** Fiscal Impact Statement from Department of Planning and Budget (SB320)
- **2026-03-04** Signed by Speaker `passage`
- **2026-03-04** Signed by President `passage`
- **2026-03-10** Enrolled Bill communicated to Governor on March 10, 2026 `enrolled, executive-receipt`
- **2026-03-10** Governor's Action Deadline 11:59 p.m., April 13, 2026 `executive-receipt`
- **2026-04-06** Approved by Governor-Chapter 180 (effective 7/1/2026) `executive-signature`
- **2026-04-06** Acts of Assembly Chapter text (CHAP0180)

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/a8fe5c2d-a801-4908-8b2d-d1a68446f761`. Confidence: reported (aggregated from official Virginia legislature records).