Even the slightest trace of snow can be enough to cause major issues on roadways in Dallas-Fort Worth.

Out of the 200 largest cities in the U.S., Dallas ranks 178th on Allstate's 2018 list of safest driving cities — both overall and for driving in snow and rain. When controlled for population density, Dallas drops to 184th.

Fort Worth drivers fare slightly better than Dallas drivers. Cowtown ranks 139th overall on the list of safest driving cities, 138th for driving in snow and rain.

But not all Texas drivers are bad. Brownsville is listed as the safest driving city in the U.S. Three other Texas cities — Laredo, Midland and McAllen — also have spots in the top 10.

Which North Texas city ranks lowest on the overall list? Garland is No. 181. The safest North Texas city is McKinney, which ranks 134th, but no North Texas cities made the top 100.

D-FW's last significant snow and ice event was Feb. 3-4, 2011, according to the National Weather Service. Dallas Love Field recorded 5.1 inches of snow, and other areas of North Texas recorded more than 6 inches. The wintry precipitation caused major roadways to close and more than 300 flights were canceled at Dallas Love Field.

But it doesn't take that much to cause issues on roadways in D-FW. About 1 inch of snow fell in D-FW in February 2015, enough to cause more than 425 traffic accidents, according to KDFW-TV (Channel 4).

To compile its list, Allstate analyzed property damage frequency and hard-braking data of Allstate insured drivers from January 2015 to December 2016. The report also factors in information from the National Oceanic and Atmospheric Administration and Drivewise.

Here’s how other North Texas cities ranked overall on Allstate’s list of safest driving cities:

McKinney - 134

Fort Worth - 139

Grand Prairie - 146

Frisco - 150

Denton - 155

Arlington - 160

Plano - 163

Mesquite - 169

Irving - 175

Dallas - 178

Garland - 181