Complex sentence: The A170 road runs down the bank with a gradient of 1 in 4, or 25%, and including a hairpin bend, vehicles have to keep in low gear whist travelling up or down the bank.
Split into simpler sentences: The A170 road runs down the bank with a gradient of 1 in 4, or 25%, and including a hairpin bend. Vehicles have to keep in low gear whist travelling up or down the bank.