Heavy Duty Trucking Logo
MenuMENU
SearchSEARCH

Legal Pot in Colorado: How it's Affected Trucking

It’s been almost two years since Colorado officially legalized marijuana. With other states considering similar measures, Colorado Motor Carrier Association President Greg Fulton reflects on the law and its impact on the trucking industry.

by Greg Fulton, CMCA
November 17, 2015
Legal Pot in Colorado: How it's Affected Trucking

Cannabis station, a medical marijuana dispensary, is located at the site of a former gas station in Denver. Photo by Jeffrey Beall via Flickr through Creative Commons license.

4 min to read


It’s been almost two years since Colorado officially legalized marijuana. With other states considering similar measures, it's a good time to reflect on the Colorado experience and the impact of the law on the trucking industry.

Ad Loading...

Colorado voters passed a voter referendum in 2012 that authorized the legal sale of marijuana for recreational use, treating it in a manner similar to alcohol. The law took effect on January 1, 2014. Many proponents of the measure viewed enforcement of marijuana laws as a poor use of law enforcement and court resources. They also felt that passage would also eliminate the black market in this drug. Further, many saw that the taxation of this product could significantly increase the state's revenue, which could be used for primary education as well as drug prevention and rehabilitation programs.

Colorado’s experience has been a mixed one of both anticipated and unforeseen developments.

Ad Loading...

First, the legalization has been a boon for the state’s tax revenues, generating over $70 million in additional revenue annually. While much needed by the state and local governments, this amount falls short of original expectations. This may be somewhat explained by the fact that it is a cash-based industry because of legal limitations associated with the use of credit or debit cards. A pure cash business does not lend itself well to tracking or an audit trail, and some estimate that revenues for this industry may be significantly underreported.

Second, a key area of concern was the impact of legalization on crime and highway safety. Opponents of the measure had predicted that crime would increase based on the financial needs of users. Proponents felt that crime would drop, as the decriminalization would reduce drug trafficking and the crimes associated with it. The facts fail to support either premise. Crime levels are similar to what they were prior to the passage, without a significant increase or decrease in key categories.

In regard to traffic safety and accidents, the impact has been difficult to determine because of the lack of a good, quick, roadside test for marijuana as there is for alcohol. Recent reports do indicate that traffic fatalities involving a party who has marijuana in their system have risen, but overall Colorado’s accidents and fatalities are not significantly greater than prior to legalization.

Third, usage levels for marijuana appeared to increase across all age groups since the legalization. This has created a particular problem for the trucking industry and other employers in Colorado that either by law or choice require a drug-free workplace.

Legalization has made an already critical shortage of drivers worse. While motor carriers continue to tell their truck drivers that they are in violation of the law if there is even a trace of marijuana in their system, our companies continue to see high failure rates on drug tests.

Ad Loading...

In addition, other positions or jobs in the trucking industry where employees are tested have also seen a spike in failed tests. As an example, one company hiring dock workers specifically told all applicants before they applied that they would be drug tested prior to consideration. Even with this prior warning, 70% of the applicants still tested positive.

Unexpected consequences

While our industry anticipated the challenge associated with a higher failure rate for drug tests, we did not foresee some of the other challenges associated with legalization.

One major surprise was the space/storage requirements for the marijuana industry.

One major surprise was the space/storage requirements for the marijuana industry. The marijuana industry is much more than the local shop that sells the product. It requires an infrastructure of "grow houses" and warehouses to support the business. The magnitude of this demand and its impact on industries like trucking was clearly underestimated. The price of warehouse space as well as terminals (that have been converted) has risen dramatically, and there is now a shortage of space.

A recent article noted that between 2009 (the year when medical marijuana was approved) and 2014, marijuana businesses accounted for more than a third of all industrial space leased in the Denver metro area. As a result, prices have soared and industrial space is at a premium. This led to several trucking companies being forced out of properties that they had leased for many years due to higher rents or the repurposing of these sites by the marijuana industry.

The most recent example of “collateral damage” from the shortage of space due to legalization was the Marine Corps Toys for Tots program. That group lost their previous space and was desperately looking to find warehouse space for storage and distribution for this Christmas season. In the past, companies donated space for this worthy cause, but the shortage of space brought on by legalization of marijuana changed things. Toys for Tots found itself for the first time ever making a plea to the public for space. Fortunately, a trucking executive member of CMCA helped to arrange for space after a significant search on our part.

Ad Loading...
Greg Fulton

We anticipate that the shortage of terminal/warehouse space may be alleviated as new industrial sites are built, as well as the possibility that legalization of marijuana in other states may reduce sales within Colorado.

We do not see an end in sight, however, on the greater challenge that legalization has created in finding drivers, technicians, and others for our industry who must be drug free to work in it.

Subscribe to Our Newsletter

More Drivers

Man seated in front of computer with inset of insights generated for a truck driver

Netradyne Intelligence Uses New AI Agents to Automate Response to In-Cab Camera Data

The company called the next-generation in-cab camera safety platform "a fundamental shift from systems that report on what happened to systems that actively drive what should happen next."

Read More →
Illustration of hourglass and trucks backed up to a dock
DriversJune 15, 2026

Why Truck Detention Keeps Costing Fleets Time and Money

A 2024 ATRI study found detention affects nearly 40% of truckload stops and costs the industry more than $15 billion annually. Despite the toll on drivers, fleets, and supply chains, the problem remains stubbornly persistent.

Read More →
Artist rendering of dealership with trucks and trailers parked outside
Equipmentby News/Media ReleaseJune 2, 2026

Prime Inc. to Open $7.9M Flagship Used-Truck Dealership

A new driver-focused facility to sell Prime Inc's used trucks and trailers will be the first purpose-built location in the company's history.

Read More →
Ad Loading...
Thumbnail for podcast episode
Safety & ComplianceMay 28, 2026

Short Takes: Inside K&B’s Truck Safety Tech

Listen to learn how K&B Transportation uses cellphone-blocking technology, speed management systems, weather geofencing, bridge avoidance tools, and more to improve driver safety.

Read More →
Nussbaum driver pay.
Driversby News/Media ReleaseMay 27, 2026

Nussbaum Expands Driver Compensation with Pay Raises, Profit Sharing

Nussbaum Transportation said its latest compensation package could push first-year driver earnings above $90,000 in key hiring markets.

Read More →
Lance Evans, Director of Safety at K&B Transportation.
Safety & ComplianceMay 13, 2026

Listen: Inside Modern Fleet Safety: AI, Cameras & Speed Control at K&B Transportation

Fleet safety is evolving fast—and technology is at the center of it. Learn how a former commercial vehicle enforcement officer turned director of safety at K&B Transportation is embracing real-world safety technology.

Read More →
Ad Loading...
Maverick Transportation Freightliner Cascadia.
Driversby News/Media ReleaseMay 12, 2026

Maverick Announces 2026 Driver Pay Raises

New raises for Maverick Transportation drivers will take effect on May 31, 2026.

Read More →
Alleged Ohio toll evasion truck.
Driversby News/Media ReleaseMay 5, 2026

Illinois Trucker Indicted for Nearly $22,000 in Ohio Turnpike Toll Evasion

Authorities say an Illinois trucker avoided paying tolls for two years, and now faces felony charges, possible prison time, and forfeiture of his Freightliner tractor.

Read More →
Illustration with trojan horse and lock with inside of cargo container in background
Fleet Managementby News/Media ReleaseApril 23, 2026

New Trojan Driver Cargo Theft Scam Bypasses Carrier Vetting Systems

Cargo theft rings plant operatives as drivers inside legitimate, fully vetted carriers, then execute coordinated thefts that look like a traditional straight theft from the outside.

Read More →
Ad Loading...
Female truck driver.
Driversby News/Media ReleaseApril 21, 2026

WIM, Trucker Path Name Top 3 Women-Friendly Truck Stops

ATA’s Women In Motion Council and Trucker Path highlight three truck stops that meet all seven safety-focused criteria and rank highest among female drivers.

Read More →