Who is at fault when two cars collide while changing lanes simultaneously?

[DelCarson]

When two cars collide while changing lanes simultaneously, the principle of 'right side has the right of way' applies, and the left-side vehicle bears full responsibility. The correct approach is for the left-side merging vehicle to yield to the right-side merging vehicle. If the left-side vehicle fails to yield and causes a scrape or accident, it will be held fully accountable. More details are as follows: 1. On roads with three or more lanes in the same direction, if two vehicles collide while simultaneously merging into the middle lane, determining fault requires identifying which vehicle was in the leftmost lane. In such cases, the vehicle in the left lane must yield to vehicles merging from the right lane. Therefore, when merging, drivers should carefully observe and wait for right-side vehicles to complete their merge before proceeding. 2. For accidents involving simultaneous merging into the middle lane, determining fault is relatively straightforward. The key factor is identifying which vehicle was in the leftmost lane, as that vehicle will bear responsibility (though not necessarily full responsibility, as the extent of liability depends on specific circumstances).