This is the root element for configuration of the traffic light system. This type is used to configure the signal groups, i.e. which signal groups are controlled together. Furthermore the type of controlling applied to this group can be set. In case of a plan based controlling the plans can be specified. Each system may have a different control strategy. See also comments for the type definition. This type or more precisely its subtypes define how a signal group system is controlled. Control can be adaptive, plan based or both. The attribute controlStrategy reflects the subtype choosen and is required for simplicity of parsing the xml-files. A signal system's plan based control is given by one or more plans per signal group. Which signal groups are controled by a plan based system can be determined by examining the plans. The system can switch to a new plan by time of day or by adaptive control mechanisms. If there is an adaptive control mechanism implemented its id or name can be set in the element of this type. When a signal system is operated by an adaptive controler the signal groups of the system must be stated explicitly, even they are given implicitly when using an adaptive plan based control. If there is an adaptive control mechanism implemented its id or name can be set in the element of this type. For plan based adaptive control strategies one or more plans can be added as well. An adaptive control can use signal plans to control the system. How this plans are used depends on the adaptive control strategy choosen. This type specifies a plan for a traffic light system. At which time of day to start using this plan At which time of day to stop using this plan Umlaufzeit Versatzzeit This element contains information when to switch on or off a signal group. The second of circulation when the signal switches to green. The second of circulation when the signal switches to red. Number of seconds before the roughcast can be done. Number of seconds after the dropping.