Dams on the river's branches require caution, however.

Most routes are grade-separated (elevated roads or tunnels) and central routes have many sharp curves and multi-lane merges which require caution to drive safely.

But the new technology has its limitations and requires caution among marketeers.

Various brands available in the market claim similar properties, but not all can react with a wide range of cement hydration by-products, and thus require caution.

However, encouraging self-help and a pharmacy-first approach requires caution.