The better alternative is forcing supplier to get an insurance. e.g. we want a road that will be X feet wide and will last Y years provided no earthquakes. Mai

The better alternative is forcing supplier to get an insurance. e.g. we want a road that will be X feet wide and will last Y years provided no earthquakes. Maintenance cost + Z dollars per day closed comes from insurance. Want to use old boring tech - you insurance cost is lower. Want to try something new and shiny. Your insurance rate is higher at first, but may go down in the future.