San Antonio has a 30 mph default speed limit on city streets, following the standard Texas urban limit. School zones drop to 20 mph during posted hours, while interstates and loops such as I-10, I-35, and Loop 410 run 65 to 70 mph.
San Antonio speed limits at a glance
| Road type | Limit |
|---|---|
| City streets (default) | 30 mph (48 kph) |
| Residential / school zones | 30 mph (48 kph) |
| Major roads / arterials | 40 mph (64 kph) |
| Highways through the city | 65-70 |
About speed limits in San Antonio
San Antonio applies the Texas default of 30 mph on most residential and city streets, the statutory prima facie limit for urban districts statewide. This 30 mph rule applies wherever a street is not otherwise signed, covering the bulk of neighborhood roads across Bexar County's largest city. Major arterials are frequently posted higher, commonly 35 to 45 mph, based on traffic-engineering speed studies. The city's Public Works department sets and signs these limits under state law.
Since 2025, San Antonio has weighed lowering its neighborhood default from 30 to 25 mph, a proposal championed by City Council members as a traffic-safety measure. The idea has advanced through council discussion but faced funding hurdles for the citywide re-signing effort, and as of 2026 the default on most streets remains 30 mph. If adopted, the change would bring San Antonio in line with lower urban limits seen in cities such as New York and Seattle.
Residential streets default to 30 mph, and school zones drop to 20 mph during posted flashing-light hours. Critically, Texas bans automated photo enforcement: a 2019 state law (HB 1631) prohibits cities from operating photographic traffic-signal enforcement, and San Antonio does not issue automated speeding tickets. Some Bexar County constable precincts have piloted camera or LIDAR scanning technology, but its legal authority to issue citations has been challenged by the district attorney.
Freeways carry the region's highest limits. I-10, I-35, U.S. 281, and Loop 410 typically run 65 to 70 mph, with a few segments retaining 70 mph inside Bexar County. All of this is enforced by officers, the Texas Department of Public Safety, and constables rather than by cameras, since photo speed enforcement is not authorized in Texas.
Enforcement
San Antonio relies entirely on officer enforcement. San Antonio police, Bexar County constables, and Texas DPS troopers make traffic stops, and there is no automated speed-camera ticketing because Texas law bans photographic traffic enforcement. Piloted camera and LIDAR scanning systems face legal challenges over their authority to cite drivers.
Tolerance
With no speed cameras, there is no fixed automated threshold in San Antonio. Officer stops are discretionary, and while many drivers travel a few miles per hour over on arterials and freeways, any amount over the posted limit can legally result in a citation.
Speeding fines in San Antonio
Texas speeding fines are set by each municipality, so amounts vary. Typical San Antonio and Bexar County citations for moderate speeding run from roughly $150 to $300 with court costs, and school-zone violations can climb higher. Fines rise steeply with speed, and going 25 mph or more over can disqualify a driver from taking a defensive-driving course to dismiss the ticket.
Frequently asked questions
What is the speed limit in San Antonio?
The default speed limit on most San Antonio streets is 30 mph, the standard Texas urban limit. School zones drop to 20 mph during posted hours, and freeways such as I-10, I-35, and Loop 410 run 65 to 70 mph.
Is San Antonio lowering its speed limit to 25 mph?
The city has considered dropping the neighborhood default from 30 to 25 mph since 2025, but funding for citywide re-signing has slowed it. As of 2026 the default on most streets is still 30 mph.
Are there speed cameras in San Antonio?
No. Texas banned automated photo enforcement under a 2019 state law, so San Antonio does not mail speeding tickets from cameras. Enforcement is done by police, constables, and DPS troopers through in-person stops.
Are there higher limits on San Antonio highways?
Yes. City streets are largely 30 mph, but interstates and loops including I-10, I-35, U.S. 281, and Loop 410 run 65 to 70 mph, with some Bexar County segments still posted at 70 mph.
More Texas speed limits
- Texas speed limit — statewide interstate, highway, and city limits.
- Houston speed limit — city defaults, school zones, and camera enforcement.
- Dallas speed limit — city defaults, school zones, and camera enforcement.
Related tools
- Convert MPH to KPH — convert any speed reading between units.
- Car speed test — verify your speedometer accuracy.
- Live GPS speedometer — see your actual speed in the browser.
- Stopping distance calculator — how far you need to brake from each speed.
- US speed limits overview — federal background and national patterns.