baht buses itinerary?

Hi

If I am at Pattaya Beach Road and I want to go to Second Road North side, I must take a baht bus, right?

If I am Pattaya Beach Road and I want to go to Jomtien, I must take a baht bus also, right?

If I am right, how shall I know wich bus goes to 2nd Rd and wich one goes to Jomtien?

Or am I wrong?

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