To solve the puzzle you must go to;
N 51° (Södra Länken Daytime) (Limehouse + Tingstadstunneln). (Ramsgate) (Schipholtunnel) (Dartford Tunnel)
W 002° Rotherhithe (Mersey + Clyde + Knappetunnelen ). (Blackwall+Vålerengtunnelen+Beneluxtunnel) (East India Dock Road+Hammersborgtunnelen+Södra Länken Daytime) (Festningstunnelen)
Indyknight pointed out some now have multiple ratings, for Knappe use the rush hour rating.
Abnormal loads and breakdowns states
Tunnel Category A
Restrictions
No restrictions for the transport of dangerous goods.
Tunnel Category B
Restrictions
Restriction for Dangerous Goods which may lead to a
Very large explosion
Tunnel Category C
Restrictions
Restriction for Dangerous Goods which may lead to a
Very large explosion
A large explosion
A large toxic release
Dangerous goods restricted in a category B tunnel
Tunnel Category D
Restrictions
Restriction for Dangerous Goods which may lead to a
Very large explosion
Large explosion
Large toxic release
Large fire
Dangerous goods restricted in a category C tunnel.
Tunnel Category E
Restrictions
Restriction for all Dangerous Goods other than UN Nos. 2919, 3291, 3331, 3359 and 3373.
Cache placed with kind permission of the National Trust.