The objective of this study was to investigate effectiveness of a common drift-fence trap, the single-funnel trap, in comparison with a new one-way double-funnel design. We expected this new design to decrease escapes over standard trapping techniques and, therefore, increase efficiency of sampling using drift fences. Five 15-m, linear, drift-fence arrays with three 15-m, Y-shaped arrays were placed at two field sites in central Texas and a single 15-m, linear array was placed at a field site at Seabrook Island, South Carolina. Each array contained an equal number of the single-funnel and double-funnel traps. One-way double-funnel traps caught and retained significantly more reptiles, total herpetofauna, and total vertebrates than did single-funnel traps. Our results indicated that double-funnel traps offer an improved trapping technique when compared with the typical single-funnel trap.