A police officer is present at a railroad crossing and is directing traffic. What should the school bus driver do?

49 CFR § 383.123(a)(2)(iii); AAMVA CDL Manual Section 10.4.4, p.10-8

A police officer at a crossing usually means the automatic signals cannot be relied on, whether due to a malfunction or an unusual situation like a stalled train. The officer has real-time information the driver does not, so following their direction is safer than relying on the gate or lights alone.