In rural areas, you must lie further back and know the terrain. Two vehicles can also use the leapfrog technique. A three-officer or three vehicle tactic is called the ABC method. This allows the officers to change places from time to time, and cuts down on the risk of losing a subject. One car follows the subject, another leads, and another two maintain positions on parallel routes.
Coordination is handled by radio.
This works well in both urban and rural areas. Smarter subjects will go up to a uniformed officer and point you out as someone who is following them. Another trick is when the subject drops a worthless piece of scrap paper to see if you pick it up. A variation on this is when the subject goes up to a passerby, shows him or her an address on a piece of paper, and asks directions. Almost any erratic behavior may be an attempt at evasion.