The adhesive and digital vignettes on Austria's highways are checked through a combination of physical inspections by authorities and automated electronic systems. Authorities conduct spot checks and patrols to ensure that vehicles have valid vignettes displayed. Additionally, there are electronic tolling systems in place that can automatically detect vehicles without valid vignettes as they pass through tolling points. This multi-faceted approach helps to ensure compliance with the vignette requirements on Austria's highways. **

One can learn highways by studying road signs, understanding traffic rules and regulations, and practicing driving on highways with an experienced driver. It is important to familiarize oneself with highway driving techniques such as merging, changing lanes, and maintaining a safe following distance. Additionally, taking a defensive driving course can help improve skills and confidence when driving on highways. **

Graffiti on highways is considered illegal and is typically seen as vandalism. It can be dangerous as it may distract drivers and obstruct important signs or markings on the road. Additionally, the cost of removing graffiti from highways can be expensive and can divert resources away from other necessary maintenance and repairs. Overall, graffiti on highways is generally discouraged and efforts are made to prevent and remove it. **

I'm sorry, but I do not have real-time information on highway closures. I recommend checking with local authorities or news sources for the most up-to-date information on highway closures. **

Yes, deer do venture near highways, especially during dawn and dusk when they are most active. Highways often cut through or near natural habitats of deer, and the presence of vegetation and water sources near highways can attract them. This can lead to an increased risk of vehicle collisions with deer, especially in areas where deer populations are high. Drivers should be cautious and alert when driving near wooded areas or open fields, as deer may suddenly appear near the road. **

Drifting on highways involves intentionally oversteering a car while maintaining control through a turn. To drift on highways, one must have a rear-wheel-drive vehicle, preferably with a manual transmission for better control. It is important to find a safe and empty stretch of highway with minimal traffic to practice drifting. Additionally, it is essential to have proper driving skills, knowledge of the car's handling capabilities, and practice in a controlled environment before attempting to drift on highways. **

Germany's highways are known for their excellent quality and well-maintained infrastructure. The Autobahn, in particular, is famous for its high speed limits and smooth road surfaces. The signage and road markings are clear and easy to follow, making it relatively easy to navigate the highways. Overall, Germany's highways are efficient and well-designed, providing a smooth and enjoyable driving experience for travelers. **

Trees near highways may actually grow slower than those in other areas. The pollution from vehicle emissions can have a negative impact on the growth and health of trees. Additionally, the constant exposure to road salt and other chemicals used for de-icing can also hinder the growth of trees near highways. These factors can lead to stunted growth and reduced overall health of trees in these areas. **