Does a police officer standing near a Tennessee red-light or speed camera make the device 'manned,' so that the statutory restrictions on automated enforcement no longer apply?

Subject

Opinion No. 12-21, Unmanned Traffic Enforcement Cameras February 22, 2012

Plain-English summary

Tennessee regulates automated traffic enforcement cameras (red-light cameras, speed cameras) under Tenn. Code Ann. § 55-8-198. The statute imposes many constraints on "unmanned" cameras: signage at specific distances, a ban on placement on federal interstates, a ban on speed cameras within one mile of a speed-limit reduction of 10 mph or greater (except in school zones), POST-certified officer review of video evidence, and dismissal of citations where the captured image is inconsistent with vehicle registration. Representative Lollar asked whether a camera stops being "unmanned" when a police officer is physically present near it.

The AG drew a line between active and passive operation:

• Manned (statute does not apply). A camera an officer actively operates. The clearest example: a camera mounted in a moving patrol car, or a hand-held radar gun. The officer is making real-time decisions, capturing evidence, and triggering citations.
• Unmanned (statute applies). A camera that captures evidence automatically and generates citations through computer processing, even if an officer happens to be standing nearby and is not actually operating the device.

The statutory text and purpose drove the conclusion. The plain meaning of "manned" is "operated by a human being" (the AG cited The American Heritage Dictionary). The statute repeatedly speaks of cameras that "monitor" speed, "identify" violations, and produce citations "based solely upon evidence" obtained from the device. That language describes machines functioning independently. Tenn. Code Ann. § 55-8-198(a), (b)(1), (c)(1), (h)-(l). The statutory purpose is also clear: signage requirements give drivers fair warning that automated enforcement is in operation. Letting a city park an officer near a camera and call it "manned" would defeat that warning purpose. So courts would not extend the manned exception to passive presence.

The opinion's practical effect: cities cannot dodge the statutory restrictions (signage, interstate ban, speed-zone proximity rules, POST review) by stationing an officer next to an automated camera.

Currency note

This opinion was issued in 2012. Subsequent statutory amendments, court decisions, or later AG opinions may have changed the analysis. Treat this page as historical context, not current legal advice. Verify current law before relying on any specific rule, deadline, or remedy mentioned here.

Tenn. Code Ann. § 55-8-198 has been amended multiple times since 2012, and Tennessee has continued to debate and revise automated traffic enforcement rules. Anyone challenging or defending an automated citation today should pull the current statute.

Background and statutory framework

§ 55-8-198 overview. Tennessee's traffic-camera statute permits citations issued "based solely upon evidence obtained from an unmanned traffic enforcement camera" but imposes many restrictions.

Specific restrictions.

• Generally banned on federal interstates. § 55-8-198(f).
• Speed cameras cannot sit within one mile of a speed-limit reduction of 10 mph or greater on a public road or highway, except in school zones. § 55-8-198(i).
• Signage required 500-1000 feet in advance. § 55-8-198(c)(2).
• "No Turn on Red" signs required for cameras detecting unlawful right turns. § 55-8-198(i).
• Red-light camera evidence must show the target vehicle's front tires before the stop line and rear tires beyond it, both while the signal is red. § 55-8-198(c)(1), (h).
• Image inconsistent with vehicle registration: invalid citation. § 55-8-198(k).
• Only POST-certified or state-commissioned officers may review red-light camera video and decide whether a violation occurred. § 55-8-198(b)(1).

Statutory construction principles. Plain meaning controls when the language is clear. Carter v. Bell (Tenn. 2009). Words take their natural and ordinary meaning in context. Lee Medical (Tenn. 2010). Dictionaries may help. State v. Majors (Tenn. 2010).

The active-vs-passive distinction. The AG read "manned" through its plain meaning ("operated by a human"). A camera operated by an officer (e.g., a patrol-car-mounted device the officer is using to capture evidence) is not "unmanned." A camera that captures and processes evidence automatically is "unmanned" even if an officer is standing within sight. The signage and other restrictions exist to give drivers fair warning; passive officer presence does not substitute for that warning.

Common questions

Q: A red-light camera at my intersection has no signs posted, but I saw a police car parked next to it. Is my citation valid?
A: Per this opinion, no. Passive police presence does not make the camera "manned," so the signage requirements of § 55-8-198(c)(2) still apply. An unsigned automated camera fails the statute and the resulting citation is vulnerable. Consult a Tennessee attorney for any specific challenge.

Q: Is a hand-held radar gun governed by § 55-8-198?
A: No. A hand-held radar operated by an officer is a "manned" device. § 55-8-198 only regulates unmanned automated cameras.

Q: What about a fixed camera that an officer remotely activates from a control room?
A: The opinion did not directly address remote real-time operation. The active-passive line suggests that real-time human triggering moves the device into the "manned" category, but a Tennessee court has not definitively resolved hybrid setups.

Q: Can I be cited solely on camera evidence?
A: Yes. § 55-8-198(a) expressly permits citations "based solely upon evidence obtained from an unmanned traffic enforcement camera." The statute does, however, layer in review requirements (POST-certified officer review for red-light citations under § 55-8-198(b)(1)) and content rules for the captured images.

Q: Are unmanned cameras allowed on Tennessee interstates?
A: Generally no, under § 55-8-198(f). Limited exceptions may exist; check current law.

Citations and references

Statute:

• Tenn. Code Ann. § 55-8-198 (in entirety)

Cases:

• Carter v. Bell, 279 S.W.3d 560 (Tenn. 2009)
• Lee Medical, Inc. v. Beecher, 312 S.W.3d 515 (Tenn. 2010)
• State v. Majors, 318 S.W.3d 850 (Tenn. 2010)

Source

• Landing page: https://www.tn.gov/attorneygeneral/opinions.html
• Original PDF: https://www.tn.gov/content/dam/tn/attorneygeneral/documents/ops/2012/op12-021.pdf

Original opinion text

Unmanned Traffic Enforcement Cameras
QUESTION
Whether a traffic enforcement camera is "unmanned" for purposes of Tenn. Code Ann.
§ 55-8-198 when a police officer is present with the device.
OPINION
An "unmanned traffic enforcement camera" is an automated device that collects
photographic evidence of traffic violations without the active participation of a law enforcement
officer. Where an officer operates a device, it is not "unmanned" for purposes of Tenn. Code
Ann. § 55-8-198, but the mere passive presence of an officer near a traffic enforcement camera
that otherwise functions automatically does not remove the device from the ambit of the statute.
ANALYSIS
Tenn. Code Ann. § 55-8-198 contemplates the issuance of traffic citations "based solely
upon evidence obtained from an unmanned traffic enforcement camera," Tenn. Code Ann. § 55-
8-198(a), but imposes restrictions on the use of these devices. For example, generally unmanned
traffic enforcement cameras may not be located on federal interstate highways. Tenn. Code Ann.
§ 55-8-198(f). Similarly, except for school zones, cameras that monitor speed are not permitted
within one mile of a reduction in the speed limit on a public road or highway of ten miles per
hour or greater. Tenn. Code Ann. § 55-8-198(I).
Signage is also mandated for unmanned traffic enforcement cameras. A political
subdivision that owns or operates an unmanned traffic enforcement camera must post appropriate
signs informing drivers of the presence of cameras not less than five hundred feet but not more
than one thousand feet in advance of the enforcement area. Tenn. Code Ann. § 55-8-198(c)(2).
For cameras that detect unlawful right turns at red signals, clearly marked "No Turn on Red"
signs must be erected at intersections. Tenn. Code Ann. § 55-8-198(i).
Finally, Tenn. Code Ann. § 5-8-198 regulates the content of evidence collected by
unmanned traffic enforcement cameras. Thus, for example, evidence of red light violations must
show the target vehicle with its front tires before the stop line and subsequently with its rear tires
beyond it, both while the signal is red, and, more generally, cameras must not identify as
violators vehicles that in fact entered the intersection legally. Tenn. Code Ann. § 55-8-198(c)(1)
& (h). Evidence captured by an enforcement camera that is inconsistent with the registration
information of the target vehicle results in an invalid citation. Tenn. Code Ann. § 55-8-198(k).
In all cases, only POST-certified or state-commissioned officers are authorized to review video
evidence from a traffic light signal monitoring system and make a determination whether a
violation has occurred. Tenn. Code Ann. § 55-8-198(b)(1).
The statute does not define the term “unmanned traffic enforcement camera.” The
paramount rule of statutory construction “is to ascertain and give effect to legislative intent
without broadening the statute beyond its intended scope.” Carter v. Bell, 279 S.W.3d 560, 564
(Tenn. 2009). Courts “must always begin with the words that the General Assembly has chosen”
and “must give these words their natural and ordinary meaning.” Lee Medical, Inc. v. Beecher,
312 S.W.3d 515, 526 (Tenn. 2010). These words must also be construed “in the context in
which they appear in the statute and in light of the statute’s general purpose.” Id. Courts may
also refer to dictionary definitions where appropriate to ascertain the ordinary and natural
meaning of words used in a statute. State v. Majors, 318 S.W.3d 850, 859 (Tenn. 2010).
Application of these statutory rules of construction to the question presented leads to the
conclusion that the term “unmanned traffic enforcement camera” refers to an automated device
that collects evidence of traffic violations without the active participation of a law enforcement
officer. At the outset, the ordinary meaning of the word “manned” is “transporting or operated
by a human being.” The American Heritage Dictionary 763 (2nd college ed. 1985). Use of the
antonym suggests an intent to encompass devices that function automatically. Similarly, the
statute speaks of traffic enforcement cameras that “monitor” speed and “identify” violations and
on five separate occasions refers to citations “based solely upon evidence” obtained from the
cameras. Tenn. Code Ann. § 55-8-198(a), (b)(1), (c)(1), (h)-(l). This language, too, is
suggestive of machines that perform their functions without the intervention of a human agent.
On this reading, a camera that is operated by an officer—as, for example, a camera mounted in a
patrol car—would not be subject to the restrictions set forth in Tenn. Code Ann. § 55-8-198.
Both the purpose and the context of those restrictions, however, counsel against extending this
construction to situations in which an officer is present with an automated device, but plays no
active role in collecting evidence or issuing a citation. Among other things, the signage
requirements serve to give motorists fair warning that traffic enforcement cameras are in
operation. See, e.g., Tenn. Code Ann. § 55-8-198(c)(2). Allowing the mere presence of an
officer near an “installed” traffic enforcement camera that otherwise functions automatically to
relieve local governments of the obligation to post appropriate signs (or to meet other
requirements of the statute) would frustrate that legislative goal. Accordingly, this Office
concludes that an automated traffic enforcement camera remains “unmanned” for purposes of
Tenn. Code Ann. § 55-8-198 notwithstanding a purely passive police presence in the environs of
the device.
& (h). Evidence captured by an enforcement camera that is inconsistent with the registration
information of the target vehicle results in an invalid citation. Tenn. Code Ann. § 55-8-198(k).
In all cases, only POST-certified or state-commissioned officers are authorized to review video
evidence from a traffic light signal monitoring system and make a determination whether a
The statute does not define the term "unmanned traffic enforcement camera." The
paramount rule of statutory construction "is to ascertain and give effect to legislative intent
without broadening the statute beyond its intended scope." Carter v. Bell, 279 S.W.3d 560, 564
(Tenn. 2009). Courts "must always begin with the words that the General Assembly has chosen"
and "must give these words their natural and ordinary meaning." Lee Medical, Inc. v. Beecher,
312 S.W.3d 515, 526 (Tenn. 2010). These words must also be construed "in the context in
which they appear in the statute and in light of the statute's general purpose." Id. Courts may
also refer to dictionary definitions where appropriate to ascertain the ordinary and natural
Application of these statutory rules of construction to the question presented leads to the
conclusion that the term "unmanned traffic enforcement camera" refers to an automated device
that collects evidence of traffic violations without the active participation of a law enforcement
officer. At the outset, the ordinary meaning of the word "manned" is "transporting or operated
by a human being." The American Heritage Dictionary 763 (2nd college ed. 1985). Use of the
antonym suggests an intent to encompass devices that function automatically. Similarly, the
statute speaks of traffic enforcement cameras that "monitor" speed and "identify" violations and
on five separate occasions refers to citations "based solely upon evidence" obtained from the
cameras. Tenn. Code Ann. § 55-8-198(a), (b)(1), (c)(1), (h)-(1). This language, too, is
suggestive of machines that perform their functions without the intervention of a human agent.
On this reading, a camera that is operated by an officer-as, for example, a camera mounted in a
patrol car-would not be subject to the restrictions set forth in Tenn. Code Ann. § 55-8-198.
Both the purpose and the context of those restrictions, however, counsel against extending this
construction to situations in which an officer is present with an automated device, but plays no
active role in collecting evidence or issuing a citation. Among other things, the signage
requirements serve to give motorists fair warning that traffic enforcement cameras are in
operation. See, e.g., Tenn. Code Ann. § 55-8-198(c)(2). Allowing the mere presence of an
officer near an "installed" traffic enforcement camera that otherwise functions automatically to
relieve local governments of the obligation to post appropriate signs (or to meet other
requirements of the statute) would frustrate that legislative goal. Accordingly, this Office
concludes that an automated traffic enforcement camera remains "unmanned" for purposes of
Tenn. Code Ann. § 55-8-198 notwithstanding a purely passive police presence in the environs of
the device.
ROBERT E. COOPER, JR.
Attorney General & Reporter
WILLIAM E. YOUNG
Solicitor General
JAMES E. GAYLORD
Assistant Attorney General
Requested by:
Representative Ron Lollar
99th Legislative District
214 War Memorial Building
Nashville, TN 37243
Attorney General & Reporter