 On 27 October 1959 a derailment at Polmaise had closed the Larbert to Stirling main line, and a Glasgow to Oban and a Glasgow to Aberdeen passenger express trains were diverted over the Alloa viaduct, reversing at Alloa and Stirling.The passenger service over the bridge, between Larbert and Alloa, was discontinued from 29 January 1968, and the heavy freight service was closed from May 1968.A very infrequent goods service ran across the bridge to Throsk until May 1970.