42 The Federal Aviation Administration (FAA) has recognized for some time that its current rigid 43 pavement design model, involving a single slab loaded at one edge by a single aircraft gear, is 44 inadequate to account for top-down cracking. Thus, one of the major observed failure modes for 45 rigid pavements is poorly represented in the FAA Rigid and Flexible Iterative Elastic Layer 46 Design (FAARFIELD) program. A research version of the FAARFIELD design software has 47 been developed (FAARFIELD 2.0), in which the single-slab three-dimensional finite element 48 (3D-FE) response model is replaced by a 4-slab 3D-FE model with initial temperature curling to 49 produce reasonable thickness designs accounting for top-down cracking behavior. However, the 50 long and unpredictable run times associated with the 4-slab model and curled slabs make routine 51 design with this model impractical. In this paper, use of artificial intelligence (AI)-based 52 alternatives such as artificial neural networks (ANNs) with potential for producing accurate 53 stress predictions in a fraction of the time needed to perform a full 3D-FE computation has been 54 investigated. In the development of ANN models, a synthetic database of FAARFIELD input55 output pairs representing a number of realistic scenarios were developed. Moreover, ANN 56 models for only mechanical and simultaneous mechanical and thermal loading cases were 57 developed and accuracy predictions of these models were documented. It was observed that very 58 high accuracies were achieved in predicting pavement responses for all cases investigated. 59