I want to know the answer to the following question:
What can be treacherous even in summer due to steep slopes?
All the background I'm provided with is that "The lower regions and larger towns of the Alps are well-served by motorways and main roads, but higher mountain passes and byroads, which are amongst the highest in Europe, can be treacherous even in summer due to steep slopes.". Is that enough to answer the question?
Answer: yes