Driving on the Hanoi - Ninh Binh expressway at over 90 km/h, the dashcam car had to brake suddenly when the vehicle ahead braked and changed lanes to the right. The unexpected obstacle was a car undergoing a tire change in the lane closest to the median strip, a lane with a speed limit of 120 km/h.

Behind the stopped car was a small suitcase placed only 4 to 5 meters away. Besides the person changing the tire, a group of 4 others stood nearby. Fortunately, no collision occurred.

When faced with an unexpected situation like a flat tire on the expressway, drivers should move to the emergency lane. Even with a flat, driving a few dozen meters from the left lane to the emergency lane won't cause significant additional damage. Even if moving to the emergency lane damages the tire and rim, safety is paramount.

In this case, the driver placed the suitcase as a warning very close to the vehicle, rendering it almost useless. According to safety standards, warnings in a 120 km/h lane should be placed 250 meters away. If less, at least 150-200 meters.

The correct procedure for a flat tire is to pull into the emergency lane, activate hazard lights, and place warning triangles or cones about 100-150 meters behind the vehicle. All passengers should exit the vehicle and move beyond the guardrail. The person changing the tire should wear a reflective vest for visibility.

Nguyen Vu