Matbeam is a complete beam analysis tool for single and multi-span structures.  It is a perfect solution for a design engineer wishing to solve complex beam analysis with relative ease. Matbeam's user defined live load library can easily be used to model truck+lane, truck, and pure lane loading.  The program's available load cases make it a perfect choice for analyzing AASHTO Standard and AASHTO LRFD load combinations.  More information about Matbeam can be found here.