1.   As part of the many additions and improvements, the speedway already had announced that a second pedestrian tunnel was being constructed near the fourth turn.

2.   In addition to the subway, two river bridges and a major tunnel have been completed and a second tunnel is to be finished by next year.

3.   To complete the system for two-way traffic, a second tunnel might be added.

4.   Federal agents have discovered a second tunnel that was apparently used to smuggle drugs across the Mexican border.

5.   The second tunnel is planned under the St. Gotthard pass which passes through central Switzerland.

6.   Adel ruled out building a second tunnel, saying it would impede future plans to deepen the canal.

7.   It was the second tunnel discovered this week at the facility.