When two vehicles arrive to an intersection at the same time, which one has the right-of-way when no signs or signals indicate rules?

At an intersection of two similar roads without a traffic control device, a driver must yield to a vehicle approaching from the right.

• The car approaching from the right has the right-of-way.
• The car approaching from the left has the right-of-way.
• The car in which the driver sounds his horn first has the right-of-way.
• The car that is traveling the fastest has the right-of-way.