Visitors at an open house lined up in March to get a look at Oklahoma City's new streetcars. [Photo by Jim Beckel, The Oklahoman]

Tuesday, overhead wires will be tested.

If all goes as planned, a truck will pull a streetcar around the Bricktown loop on Thursday evening.

Three things to know:

• Downtown motorists must learn to share the road with streetcars.

• Cars that are parked blocking the tracks could be towed.

• Testing on city streets is expected to continue for six months.