Based on the clue 'a railroad or a gambling game you could be railroa...', what is the answer?

What is associated with: a rail bridge across this firth at queensferry scotland has 2 1700 foot spans? Based on the clue 'a rail found on inaccessible island near tristan d...', what is the answer? Based on the clue 'a railroad an avenue are both named for this stat...', what is the answer? Based on the clue 'a railroad man smoked my eyelids and punched my t...', what is the answer? Based on the clue 'a railroad president named aberdeen south dakota f...', what is the answer? Based on the clue 'a railroad tunnel under the mersey river connects ...', what is the answer? Based on the clue 'a railway link across the mekong river connects th...', what is the answer? Based on the clue 'a rainbow bridge called bifrost linked midgard the...', what is the answer?