How do you say traffic jam?
I was late again because of traffic jam.
I was late again because of heavy traffic.
My bad luck, I met all of the traffic lights.
My bad luck , I met all the red traffic lights.

I know all of them are not correct, How do you express it in right way, Thanks.

Question

How do you say traffic jam?
I was late again because of traffic jam. 
I was late again because of heavy traffic. 
My bad luck, I met all of the  traffic lights.
My bad luck ,  I met all the red traffic lights.

I know all of them are not correct, How do you express it in right way, Thanks.

Answer

I was late again because of a traffic jam.
I was late again because of the heavy traffic.
It was my bad luck, I had to stop at every traffic light.
It was my bad luck , I hit all the red  lights.