The RED car is entering a freeway from a side street. If you are driving that RED car, you have the following responsibilities;
1. Use the onramp aka acceleration lane to ACCELERATE to freeway speeds. If you try to enter the freeway at much slower speeds, you will do nothing but cause a problem.
2. USE your left turn signal. Remember, a signal doesn't automatically give you the right to change lanes. You have to do so safely. DO NOT cut across all lanes to the left lane.
3. You do NOT have the right of way. Plan accordingly and begin making your plan as you start onto the ramp, not when you reach the end.
4. If you still run out of space and haven't merged, pull over to the shoulder and wait for traffic to clear, then speed up on the shoulder and merge. DO NOT try to force your way on the freeway. (if you follow #3 and plan ahead, this won't happen)
The GREEN car is already on the freeway, driving in the #2 lane. If you are driving the GREEN car, you have the following responsibilities;
1. MAINTAIN your speed so the red car can plan for you.
2. You may change lanes to the #1 lane if safe to avoid the situation or you may slow down to allow the red car to merge in front of you.
If you are in the #1 lane, DO NOT change lanes into the #2 while vehicles are merging. Wait until they have merged, then you may change lanes for a future exit.
Courtesy is underrated and infrequent. We could use a bit more of it out there.
I drive anywhere from 1,200 - 1,500 miles a week for work and have seen just about everything out there on the road.
CHP for letting me use their diagram on the website.