through the platform ptos buy resources taxi and bus service from private companies and combined with all the planned trips generated through different remote online ordering modules used by a number of authorities optimise the utilisation of that capacity in real time because of volume discounts and auctioned prices the ptos realise costsavings compared to if they had purchased these services through more traditional procurement routes the spotmarket seeks to ensure bids aligned with the lowest generalised cost on the basis of unitprices eur per vehicle hour submitted by operators every year alongside other factors including estimated trip distance and duration proximity to the customer requesting the service special needs the customer may have and the quality rating for participating hauliers the longerterm market is comprised of two to fouryear contracts guaranteeing a minimum availability and quality assurances