There will be railroad maintenance between Hamm and Kassel. This will most likely lead to major scheduling changes or the cancellation of trains. However, busses will be provided to account for cancelled or rescheduled trains.
From August 6th – August 19th, busses will substitute trains between Hamm and Soest, as well as between Warburg and Kassel.
From August 20th there will be busses substituting trains between Hamm and Soest. Therefore, the RB89 only runs between Münster and Hamm, and Soest and Warburg.
From Friday, July 15th onwards, IC-Trains for line Köln – Düsseldorf – Dortmund – Hamm – Paderborn – Kassel.W. – Erfurt – Gera are cancelled.
It might make sense to go to Bielefeld or Hannover first and then take a train from there to Paderborn. This might be a detour for participants coming from the East or the South. However, this might save you trouble with the substitution busses.
From Paderborn Main Station you can take the Line 4 and Line 9 busses to get to the "Uni Südring" stop. The busses run every quarter of an hour.
Information on the 9-Euro Ticket:
In Germany, since June 1st, it is possible to use all buses and trains in public local and regional transport all over Germany for nine euros a month. This offer is valid for the calendar months of June, July, and August and can be used without limitation of the number of journeys. However, long-distance trains (e.g., IC, EC, ICE as well as Flix trains and long-distance buses) are excluded. In addition, the 9-Euro ticket is only valid for second class.
It can be easily booked via the website of Deutsche Bahn (https://www.bahn.com/en/offers/regional/9-euro-ticket-en) or at vending machines and counters. The ticket is an initiative of the German government as part of the energy relief package and is intended to compensate the increased energy and fuel prices for citizens and thus offers an economical way to travel around Germany in an environmentally friendly way. Cancellation (exchange or refund), however, is excluded. Due to the high demand there may also be overcrowded trains and delays. This should be included in your travel planning. Therefore, when deciding on the ticket, it is advisable to keep an eye on current information about the trains and to check the departure times.
As the 9-Euro ticket covers all public local transport systems in Germany you may also use it for the public busses in Paderborn.