Jody Craig Martin was too "wasted" to remember ramming into the back of two cars in separate incidents on March 30.
Martin was driving on Grey St at 4.56pm when he hit the back of a car stopped at an intersection. Police prosecutor Sergeant Rachel Willemsen told Whanganui District Court Martin stopped to yell at the victim before driving away from the scene "erratically".
"The road was dry and well lit by bright sunshine," Ms Willemsen said.
Martin, who did not have a current driver's licence, drove into Parsons St, where he tailgated another car at the intersection with Great North Rd at 5.07pm. He stopped behind the other car but then rammed the back of it.
He then "pulled into the oncoming lane and sped through a stop sign on to Great North Rd," Ms Willemsen said.