Introduction
The four isolated models are a part of the global domain ‘Transportation’. Each and every model servs a purpose that helps users to safely overcome the barriers expected within an infrastructure. The models were slightly altered to be serving bike riders as main user of the modeled infrastructure. A river was considered as the barrier to be crossed, and the integrated model servs the function of overcoming the river safely with an appropriate and efficient horizontal as well as vertical curves. The four models to be integrated are as follows:
Integration Criteria and Parametrization
The four isolated models offer a range of geometrical flexibility that can be altered according to the requirements and boundaries in hand. All geometrical and structural parameters remain adjustable within the integrated model, and are referred to as local parameter. New transportation dependent parameters were introduced to combine the local parameters and integrate them within logical relations, referred to as global parameters. So the model would be automatically and internally controlled by a set of relations to generate the geometrical and structural properties of the model based on the global parameters. The integrated model is an abstract that visualize crossing the river on higher and lower level through a bridge and a tunnel. By defining the desired capacity of the infrastructure, number of directions and users a safe, comfortable and sufficient model is generated that transport bikes as a main user over or under the river. Since the model is abstract, the main projects boundaries stay adjustable such as location, main axis and horizontal curves locations.
Development of alternatives
Since bikers are the main user of the engineering product, and the location of the barrier as well as main axis are usually given in a projects requirements, the model should alternate according to the global parameters. The global parameters were altered to generate different roads cross sections and characteristics for various transportation demands. All other geometrical properties were surely optimized within the local parameters to generate the adequate infrastructure in each alternative. Tunnels and bridges structural components properties were overlooked in the modelling as a part of establishing the global parameters concept.
First Alternative:
The first alternative visualize a transportaion infrastructure for bikes and pedestrian only in both directions, generating a specific width for each user according to German standards and according to the given average daily demand. Within the model two pathways for crossing the barrier can be simulated through the tunnel or the bridge. The following global parameters were defined for the first alternative:
- Average bikes Traffic: 7000 bikes per day
- Average cars Traffic: 0 cars per day
- Average pedestrians per day: 500 pedestrian per day
- Number of directions: 2
The first alternative blender model can be download here.
Second Alternative:
The second alternative introduces cars as a new user to the first alternative infrastructure, producing a broader road cross section and taking into account safety measures and distances in accordance to the German standards. The generated model visualizes the transportation of three users safely, comfortably and sufficiently over or under the barrier. The following global parameters were defined for the second alternative:
- Average bikes Traffic: 5000 bikes per day
- Average cars Traffic: 10000 cars per day
- Average pedestrians per day: 1000 pedestrian per day
- Number of directions: 2
The second alternative blender model can be download here.
Third Alternative:
The third alternative considers also the three users, bikes, pedestrians and cars, but in one direction. Therefore; the properties as well as the cross section of the road will be adjusted respectively. The following global parameters were defined for the second alternative:
- Average bikes Traffic: 2500 bikes per day
- Average cars Traffic: 3000 cars per day
- Average pedestrians per day: 1000 pedestrian per day
- Number of directions: 1
The second alternative blender model can be download here