commonly known as 'stints'. When the car is approximately one lap away from making its stop, the team's pit crew will set up fresh tyres and all needed pit equipment. Because of the overhead pneumatic rig, the team may have all pit mechanics in position prior to the car's arrival, with the exception of the rear jack man. Unlike almost all other forms of racing that feature routine pit stops, Formula One rules limit teams to a single pit crew for the mandatory two cars entered. Most other racing series that feature routine pit stops permit each car its own pit stall and crew. Therefore, teams must stagger their pit schedules so that only one of their two cars is in the pits at any given time; otherwise, one car must wait for the other car to finish services. However, with proper timing or in special conditions (for example, in the period immediately after the safety car being called out), it is possible for teams to pit both cars on the same lap without losing significant time; this is known as the 'double stack' strategy. This allows both of the team's drivers to race on equally fresh tyres, preventing either from having an advantage over the other, and helps the team hide the relative performance between two cars to other teams when only one car is in the pits. One strategy commonly used in Formula One pit stops is the 'undercut' involving two cars battling for track position. In this strategy, the car behind makes an earlier pit stop than the leading car; if successful, the car behind should be able to utilize the advantage of having fresh tyres to reduce the lead of the car they are attempting to overtake. If the gap between the two cars is reduced to less than the time lost in a pit stop, when the leading car pits, the leading car will exit the pits behind the car which pitted first. This strategy is especially effective when the leading car is stuck in traffic and/or if the car behind has clear track to push on, but can be negated if the car behind gets stuck in traffic after their early pit stop or is unable to drive fast enough to neutralize the advantage of the leading car. Similarly, there is the reverse (but less common) strategy of the 'overcut', where the leading car