How long did it take to dig the tunnels?
What did it cost?
How much traffic does it take?
Is the cycle/pedestrian tunnel separate?
How did people cross the river before the tunnel?
How did they dig the tunnel?
How did Brunel’s Tunnel Shield work?
How did Govan’s glacier affect the tunnel?
How did they get the earth out of the tunnel?
How did they stop the tunnel walls collapsing?
Why did miners get ‘the bends’? What are
the symptoms?
Why was there an explosion in the first tunnel?
How much does a Tunnel Boring Machine cost
on e-Bay?
How long is the tunnel? Why is it so steep?
How long would I have to ‘hold my breath’ at 30mph?
Why are the tunnels one-way only? Secret passage?
Why is the road uneven? Why does the tunnel drip?
What is inside the Portal buildings?
What should I do if my car breaks down in the tunnel?
 
 
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Cross-section   Shield construction   Glasgow Ferry
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Tunnel Miners   Brunel's Shield   Demolition
click to view enlarged Clydeshield image   click to view enlarged tunnel works  
Clyde Shield   Tunnel works   Old lining
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