  This paper presents a novel spatially consistent approach for modeling
line-of-sight (LOS) paths in vehicular networks. We use stochastic geometry to
model transmitters, obstacles, and receivers located in three parallel lines,
respectively. Their geometric interactions are leveraged to characterize the
existence of LOS paths. Specifically, the proposed approach focuses on the role
of obstacles in blocking one or more LOS paths, which has been overlooked in
most statistical models for blockage. Under the proposed framework, we derive
the probability that a typical vehicle is in LOS with respect to transmitters
with received signal-to-noise ratios greater than a threshold. The proposed
framework and LOS coverage analysis are instrumental to the analysis of
LOS-critical applications such as positioning or mmWave communications in
vehicular networks.
