There are three positions for expressway traffic police in Shandong Provincial Public Security Department, and my major doesn't correspond to this. Can you explain three positions?

1. Public security management position: engaged in road patrol duty in expressway, with three shifts, mainly engaged in outdoor road duty.

2. Accounting position: engaged in financial management; Participate in road patrol duty and implement three-shift work system. This position focuses on financial work and participates in outdoor duty work when necessary.

3. Legal position: engaged in highway public security legal work; Participate in road patrol duty and implement three-shift work system. This position is mainly responsible for the legal work of the department and participates in outdoor duty when necessary. This position is mostly involved in outdoor tasks.

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