| subway tunnel | 3.62 | Reptile takes to subway tunnels. | ||
| rail tunnel | 1.65 | The Chunnel has two rail tunnels and a service tunnel. | ||
| railway tunnel | 1.58 | ...two new railway tunnels through the Alps. | ||
| road tunnel | 1.38 | Staircases now lead down to the evacuation shaft which runs under road tunnel. | ||
| service tunnel | 1.32 | There is also a third service tunnel. | ||
| channel tunnel | 1.18 | It was like the channel tunnel? | ||
| escape tunnel | 1.12 | They also discovered escape tunnels dug by the militants. | ||
| highway tunnel | 1.12 | The dead included six construction workers who were building a highway tunnel. | ||
| traffic tunnel | 1.05 | One of the victims was a woman selling candy who drowned in a traffic tunnel. | ||
| train tunnel | 1.05 | SilverCreek Zephyr Park will have youngsters skiing through a train tunnel. | ||
| tourist tunnel | 0.99 | Then it opened a tourist tunnel near a Muslim holy site. | ||
| mountain tunnel | 0.86 | Swiss authorities said Saturday they have closed a mountain road tunnel for safety reasons. | ||
| stadium tunnel | 0.79 | At least one was handcuffed to a light stand in the stadium tunnel. | ||
| mud tunnel | 0.72 | I found no bugs or termite mud tunnels. | ||
| mine tunnel | 0.66 | They were sent into mine tunnels, too small for mules, to haul out carts of ore. | ||
| railroad tunnel | 0.66 | A railroad tunnel entered at the base of the hill. | ||
| bus tunnel | 0.53 | The downtown bus tunnel, for instance. | ||
| water tunnel | 0.53 | Mammoth water tunnel to provide lifeline for New York City. | ||
| diversion tunnel | 0.33 | The river diversion tunnel is already there ... all our previous announcements have been deferment. | ||
| drainage tunnel | 0.33 | He said the drainage tunnel was drilled through rock under a mountain without any concrete reinforcement. |