 If you liked
Kidou Keisatsu Patlabor: On Television
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 ...then you might like
Taiho Shichau zo (TV)
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Very similar settings. Both are about daily life of Police officers and have a good balance of slice of life comedy and action. Very lighthearted and the only noticeable difference is that one has Mechs in it.
Both shows are about the adventures and oftenly misadventures of Japaneese policemen from certain section, although Patlabor has a decent chunk of Mecha element in it.
Both are lengthy animes that are slice of life/police procedurals that revolve around vehicle action. The main point of variance being the police cars of 'You're Under Arrest!' TV are swapped out for police mecha in Patlabor TV. But the ensemble slice of life antics of a police department is strongly mirrored between these two shows, with the 'near future' SF setting/technology of Patalabor being the main point of divergence in the details.