The eastbound Provo-Denver passes by a "yellow board" east of Leyden on the approach to Simms Street. If you are unfamiliar with yellow boards like this one, they are an indication to trains that there is a speed restriction in place. Typically, these speed restrictions are expected to be in place for days or even weeks if MOW takes the time to put up the boards. In this case, this is a 40 MPH speed restriction.
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