California’s HOV system comprises 1,171 lane-miles, with 803 miles in the South and 366 in the North. This study analyzes peak period traffic data from hundreds of loop detectors over many months in order to evaluate the system’s effectiveness. The study finds: (1) HOV lanes are underutilized: 81% of HOV detectors measure flows below 1,400 vehicles per hour (vph); (2) Many HOV lanes suffer degr...

The impact of international trade on domestic growth is revisited in a model with dynamic externalities and static increasing returns to scale. The model embraces features of both classical and new growth and trade theories, allows for learning by doing, and integrates several strains of thought in a general equilibrium with two regions. In contrast to previous work, the model shows that intern...

PURPOSE To assess relationships between structural and functional biomarkers, including new topographic measures of visual field sensitivity, in patients with autosomal dominant retinitis pigmentosa. METHODS Spectral domain optical coherence tomography line scans and hill of vision (HOV) sensitivity surfaces from full-field standard automated perimetry were semi-automatically aligned for 60 e...

This paper assesses technologies that may be applicable for improving the effectiveness of high-occupancy vehicle (HOV) lane enforcement, and describes a test application that is being conducted on the East R.L. Thornton Freeway (I-30) Contraflow HOV Lane in Dallas, Texas. The Texas Transportation Institute has identified and investigated several technologies that potentially could improve the ...

This study sets out to capture the effect that environmental policy has on trade and specifically then examining the notion that lax environmental regulations will constitute a basis of comparative advantage, causing the least regulated jurisdictions to specialize in polluting industries. This is done partly by a survey of the empirical literature on this subject and partly by performing an eco...

The objective of this work was to measure knock resistance metrics for ethanol-hydrocarbon blends with a primary focus on development of methods to measure the heat of vaporization (HOV). Blends of ethanol at 10 to 50 volume percent were prepared with three gasoline blendstocks and a natural gasoline. Performance properties and composition of the blendstocks and blends were measured, including ...

O of the most successful transportation systems management (TSM) actions in recent years has been the priority treatment of high-occupancy vehicles (HOVS), The priority treatments typically have been either the provision of dedicated through-travel lanes or queue bypass lanes at roadway capacity restrictions. Through the use of priority measures, HOVS (buses, vanpools and carpools) are given tw...

This paper examines the impact of Virginia’s policy of exempting hybrid-electric vehicles from minimum occupancy requirements on state HOV lanes. Virginia registration statistics are used to compile hybrid market shares on a county level to compare the impact of HOV lane access to other socioeconomic variables. The HOV incentive is shown to have a significant impact in Northern Virginia, but no...