The phrase "erratic driver" refers to someone who drives in a wild, unpredictable or irregular manner. They may change lanes abruptly, brake suddenly, or speed up unexpectedly, putting themselves and others at risk. Full definition
In a driving simulator trial, people were more empathetic toward erratic drivers if they saw AR signs explaining their situation. (newscientist.com)
On a dual clutch transmission, if second is being engaged while first is being precisely released, all is well, but wear or erratic driver input might be a real problem without computer control to always keep the time, where 2 «gears» are engaged, very short. (greencarcongress.com)
Taxis are fairly cheap and rental cars are also an option, just watch out for erratic drivers. (mi-ola.com)