### Clue: Raised routes through Cape adopted by northbound boss (8)
### Answer: VIADUCTS 
 ### Explanation: Definition: Raised routes 
 VIA(through;by way of) + [ C(abbrev. for "cape" in geography) **contained in**(adopted by) **reversal of**(northbound, in a down clue) STUD(a boss;a circular rounded protuberance) ].