The "Integrated Maintenance Model" or what is now known as the "Anglo-Saxon Model" is the outsourcing that has a combination of both routine and periodic maintenance activities. This basically integrates all maintenance activities into one contract, with the exception of bridge refurbishment. These are usually area based networks, except for the USA which uses the corridor based approach. The main reasons for calling this the "Anglo-Saxon Model" is due to the fact that most countries are English speaking and typically have been fore-runners in the development of maintenance contracting. Typical activities in this "Anglo-Saxon Model" are as follows:
• All the routine maintenance activities previous mentioned
• Resurfacing
• Emergency response
• Signs & signals
• Smaller capital improvements
• Any design & expert consultant services
• Maintenance, pavement, and asset management systems
• Data collection and performance results
These contracts are usually "lump sum" and have unit prices included if unforeseen conditions require extra work and for maintenance outside the scope of the original contracts. The main difference in this model is that there are significantly more risks allocated to the service provider and that the duration is usually longer and has been typically used up to 10 years (USA states are using 5 year with a possible 5 year extension).
Sometimes small capital investment projects can be included into the contract and prices are usually agreed upon or else it can be tendered as a separate contract.
Those using this model are the DDOT (DC Streets contract), VDOT (via VMS contract), New Zealand (PSMC contracts), England and Western Australia.