This led to catastrophic traffic-flow problems on "Kreisstraße" (district road) MIL 38, for visitors would simply park their cars right at the edge of the road. Unapproved parties at the lake led to heavy pollution of much of the lakeside. In 2004 a decision was approved to build a public bathing beach. The beach was finished in time for the 2005 bathing season, and improvement to the location is clearly visible. In the future, the municipality wishes to open the Lake Plateau even more to tourism, as it is believed that there is great growth potential here. A first step in this direction is represented by the hotel on the lake, which is nonetheless mostly patronized by business travellers. On 18 October 2006, an expansion to the "Seehotel" was approved during a session of Niedernberg municipal council. The Bavarian Lower Main ("Bayerischer Untermain") belongs to the outermost reaches of the Frankfurt Rhine Main Region, an urban agglomeration surrounding that city, and structurally leans strongly in this direction. The direct link to "Bundesstraße" 469 and the Autobahn A 3 favours the resident industrial and handicraft businesses. Niedernberg can be easily reached by car, as it is linked through the B 469 to the Autobahnen A 3 and A 45. All together, Niedernberg road network has a length of 32 km. A major railway station is to be found in Aschaffenburg (Aschaffenburg Hauptbahnhof), 15 km away. Crossing Niedernberg are bus routes 60 (Obernburg, Großwallstadt, Nilkheim and Aschaffenburg) and 56 (Sulzbach, Großostheim). During the work week these public transport association buses run hourly, and on weekends every two hours. Niedernberg can even be reached by waterway. The nearest major harbour is the marina in Aschaffenburg (for sport boats, private yachts and the like). There is also an industrial harbour there, "Hafen Aschaffenburg", Lower Franconia's biggest harbour. Not far afield lie Frankfurt Airport and Aschaffenburg Airport. Moreover, in the neighbouring municipality of Obernau is found the Altenbach gliderport. The biggest employer in Niedernberg, with roughly 160 workers, is the firm ABI, in existence since 1974, a market leader in the field of special underground construction equipment.