As advanced traveler information systems become increasingly prevalent the importance of accurately estimating link travel times grows. Unfortunately, the predominant source of highway traffic information comes from single-loop loop detectors which do not directly measure vehicle speed. The...

In this short note, we propose a simplified adaptive fence procedure that reduces the computational burden of the adaptive fence procedure proposed by Jiang et al. [Jiang, J., Rao, J.S., Gu, Z., Nguyen, T., 2008. Fence methods for mixed model selection. Ann. Statist. 36, 1669-1692] for mixed...

Let y = X[beta] + Z[alpha] + [epsilon] be a mixed linear model, where [beta] is a vector of fixed effects, [alpha] is a vector of random effects, and [epsilon] is a vector of errors. Kackar and Harville (1984) showed that the best linear unbiased estimator (BLUE) of [beta] and the best linear...