What does the black circle with a 30 and a slash mean as a road sign?

[LeHailey]

The road sign with a black circle, the number 30, and a slash indicates the end of a 30 km/h speed limit. Below are detailed explanations regarding vehicle speed: 1. Overview: Vehicle speed refers to the distance a vehicle travels per unit of time, commonly measured in kilometers per hour or meters per second. Vehicle speed is one of the three key parameters in traffic flow theory and plays a significant role in traffic flow studies. 2. Others: Vehicle speed can also broadly refer to the speed of motor vehicles. Depending on different applications, vehicle speed is categorized into spot speed, running speed, and design speed. Spot speed is the instantaneous speed of a vehicle passing a specific point on the road. Design speed is the speed set to determine the design parameters of various road geometric elements and ensure their coordination.

[LeElisa]

I've been driving for over 30 years and witnessed the evolution of these road signs firsthand. That black circle with a 30 and a diagonal line means the 30 km/h speed limit zone has ended, and you can speed up. But nowadays, with crowded roads and mixed traffic, you should always check for pedestrians or obstacles before accelerating. I remember once in a small town, I ignored this sign and hit the gas, nearly colliding with a kid on a bicycle. Since then, I always take it slow—safety comes first. The government puts up these signs to alert us to speed changes, but developing good driving habits is our own responsibility, especially for new drivers. In short, signs are signals, but safety is fundamental.

[LaCameron]

As a mom with kids, I'm extra sensitive to road signs. That black circle with a 30 slash means the speed limit is lifted, but never speed up carelessly while driving. Just yesterday on the way to school, we encountered this sign, and my husband drove slowly, which helped us avoid a sudden dash of a pet dog. Although there are many signs on urban roads, safe driving comes first, and it's essential to teach children roadside rules. Regular car maintenance ensures responsive brakes to prevent accidents. Driving isn't just about going fast or slow; it's a mission to protect the family.

[AndersonLynn]

Buddy, if you love your car, you gotta know the road signs. The black circle with 30 and a slash is the end of speed limit sign, commonly seen at the exits of residential areas or city limits. Don't accelerate too aggressively when you speed up, and check your rearview mirror to make sure no other cars are tailgating. I've also studied versions from different countries—some places use red borders to make them more eye-catching. When modifying your car, remember to follow the sign regulations to avoid tickets. Safe driving makes the fun last longer; the more you drive, the more familiar you'll become.

[Cody]

Commuting every day is exhausting! The sign says the speed limit is over and it's time to accelerate, but the city is jam-packed—how can you even speed up? Last month, I was in a hurry and got caught speeding, costing me hundreds in fines—it really hurt my wallet. My advice is to drive slower to save trouble and money; observing road conditions is far more important than watching signs. Other drivers should learn the rules to avoid wasting money and time on fines. Getting home safely is what matters most.