While driving vehicles in our daily life, we often go through tunnels, sometimes even super long tunnels or tunnel groups. So, whether tunnels are safe is important to us.

The first tunnels date back to 60 B.C.

I was going in the tunnels of Paris, on the rooftops with my friends.

On Wednesday, state lawmakers ordered a state audit of the tunnels spending as well.

I was going in the tunnels of Paris, on the rooftops with my friends.

The tunnels are famous for having been used during the development of the Manhattan Project.

Supporters say the tunnels would benefit the environment and offer Californians a more secure water supply.

The tunnels are famous for having been used by the Resistance, which Victor Hugo wrote about in Les Miserables.

The public security organ can designate the route and the time for vehicles loaded with dangerous chemicals to pass or prohibit such vehicles from passing according to the requirements of the safety protection of highway tunnels and the technical conditions of highway tunnels and issue the notice to the public.

There are more than 185 miles of tunnels, and only about a mile is open to the public as a museum.

In view of the characteristics that Fujian Province is located in hilly lands and the high speed railway has many tunnels, the regulation requires that the railway construction unit or the railway transportation enterprise should be consulted before building the hilly ponds, reservoirs, and dams and digging the river channels, main canals and wells within the scope of 200 meters from the center line above the high speed railway tunnels on both sides, which might affect the safety of tunnels.

The tunnels project is endorsed by Brown and by some politically influential water districts and water customers in Central and Southern California.

The Israeli government may have seized on the outrageous murders as a pretext for provoking Hamas into a response that would allow Israel, in turn, to invade and destroy the tunnels Hamas has dug from Gaza into Israel. Though Israeli leaders claim to have been surprised by the extent and sophistication of the tunnels they discovered, Israel s military briefed the government on the tunnels more than a year ago, and the government created a special task force to consider how to deal with them.

Meanwhile, it is stipulated that no unit or individual shall destroy, damage, illegally occupy or take advantage of highway tunnels and their subsidiary facilities.

For wind tunnels, we would literally put them in a wind tunnel and blast air, and the many kilometers of cable and so on.

The 248 million in preliminary spending for the tunnels, which have yet to win regulatory approval, already is the topic of an ongoing federal audit.

Many drivers have encountered the situation in which traffic jams took place in tunnels. Some drivers are accustomed to smoking cigarettes in a tunnel to kill time.

Because we have tested ARES model, several models in a half a dozen wind tunnels at the NASA Langley Research Center for eight years, under Mars conditions.

The same water districts also announced this year they would not pay to complete the current preliminary work on the tunnels unless the project first won regulatory approval.

Vogel said the state intended to pull money to finish the tunnels planning from user fees for an existing, half century old water network, the State Water Project.

Barbers, clothes shops, fruit stalls. And a good deal of traffic with new cars smuggled in through tunnels beneath the Philadelphi Route that runs along the Egyptian border.

I was welcomed into this loose, Internet based network of people who regularly explore urban ruins such as abandoned subway stations, tunnels, sewers, aqueducts, factories, hospitals, shipyards and so on.

Israel has legitimate military objectives in Gaza to stop the rockets and destroy the tunnels. It should be pursuing those objectives while showing the utmost concern for Gaza s trapped civilians.

Project contractors pledged to pay for this project and they've used financial gimmicks to get around this obligation, said Patricia Schifferle, an environmental consultant and longtime opponent of the proposed tunnels.

Opponents say they fear the state will use the tunnels to divert too much water from the Sacramento River and San Francisco Bay, harming Northern California and further endangering native species there.

However, opponents of the tunnels and a taxpayer group were critical Thursday, and Assemblywoman Susan Eggman, one of the state lawmakers behind this week's audit order, asked the state Thursday for clarification.

Then I started going into the tunnels, which made me realize that there's a whole new dimension to the city that I never saw before and most people don't get to see.

It is here that China is currently investing billions of dollars in mega projects like expressways, tunnels, and oil and gas pipelines. This, Sering says, is surely not on account of any overflowing altruism.

Tunnel opponents, however, point to a measure state lawmakers passed in 2009 that they say bars the state from spending money on the tunnels until the water agencies that would benefit commit to paying for them.

Four bridges and innumerable tunnels and drainage canals connect Ciudad Juárez and El Paso, Texas. Rival cartels sparring for control of a plaza, the name given to any trafficking route, butcher each other and the security forces.

Metropolitan and other water districts slated to get water from the tunnels have yet to commit to paying for them, out of uncertainty whether the massive spending would really bring them enough water to make the cost worthwhile.

On Thursday, state spokeswoman Nancy Vogel said that despite the account of the Los Angeles based Metropolitan Water District, no money from the state's general fund would be used finishing the current planning phase of the twin tunnels.

On Thursday, a monthly report published by the LA based water district on the tunnels project said, the state has indicated that any additional funding needs to complete the planning phase will be provided by state or federal sources.

And to do that meant creating the flattest gradients that had ever yet been made, which meant building long viaducts across river valleys this is actually the viaduct across the Thames at Maidenhead and long tunnels such as the one at Box, in Wiltshire.

Egypt s military regime, led by General Abdel Fattah el Sisi, has been unrelentingly hostile toward Hamas, blaming it for the fighting in Sinai between the army and insurgent groups. Egypt even mounted an operation to destroy the tunnels between Gaza and Sinai, isolating Gaza completely.

The UN s Gaza peace resolution (which Britain authored) calls on the Israeli government to open up the supply lines, but this has been heeded only in small part. That is why the tunnels do such a roaring trade, which Hamas taxes to fund its activities.

They were consistently dug as limestone quarries and by the 18th century, the caving in of some of these quarries posed safety threats, so the government ordered reinforcing of the existing quarries and dug new observation tunnels in order to monitor and map the whole place.

Critics and a state lawmaker say they want more explanations on who's paying for a proposed 16 billion water project backed by Gov. Jerry Brown, after a leading California water district said Brown's administration was offering government funding to finish the planning for the two giant water tunnels.

It continued to give them the necessary support and assistance to reach the Millennium Development Goals in various areas (such as road construction and repair, creation or modernization of airports, building of electric power stations and upgrading of electricity distribution networks, construction of bridges and tunnels and development of seaports.

Israel, by contrast, failed to achieve any of its goals beginning with restoring its deterrent capacity. Indeed, despite Israel s best efforts, Hamas continued to launch long range missiles at major populated areas from Haifa in the north to Ashkelon and Dimona in the south, and it repeatedly crossed Israeli lines using underground tunnels.

For example, one important achievement of former President Felipe Calderón s administration was to push through a 140 mile highway connecting the interior city of Durango and the Pacific port at Mazatlán. Traversing extremely rough terrain with 200 tunnels and bridges, it promises to cut the transit time by three or four hours.

In addition, the owners or users of plastic covered tunnels, color plates, sunshade nets and other light objects along the high speed railway as well as low altitude floating objects, plastic protective films and other light floating objects generated during the construction process should take reinforcement and protection measures to prevent harming the safety of high speed railway.

Critics said the government funding described by the Los Angeles based Metropolitan Water District on Thursday could run counter to long standing state assurances that various local water districts, not California itself, would pay for Brown's vision of digging twin 35 mile long tunnels to carry water from the Sacramento River south, mainly for Central and Southern California.

Israel provides electricity, water, and passage to Gaza, but also maintains a siege intended to prevent imports of larger, more lethal weapons. Israeli leaders were aware of Hamas s buildup of medium range missiles, mostly smuggled through Sinai in underground tunnels, but continue to argue that, absent the siege, Iran and others would supply more (and more sophisticated) weapons.

But Israel and Egypt partners in the siege turn a blind eye most of the time to tunnels (perhaps as many as a thousand) that snake under the Egyptian border at Rafah and bring in black market goods, which Hamas then taxes. Decent would be Palestinian businessmen (the potential backbone of a middle class) are destroyed.