The Annual Tsukuba Marathon will be held on November 20, Sunday.  The running course includes the Higashi-Odori right in front of KEK.  <Traffice regulation Map>

As the result, there will be a traffic control so that it may not be easy (if not impossible) to get out of KEK or to get in KEK between around 9:00 and 11:15. 

KEK will open the South side entrance as the KEK main entrance will be practically blocked.
<A detour a Map of around KEK>

It may not be easy even for bicycles to go through the spectators and bus services will be useless. Should you need to go out or come in to KEK, you are advised to do so well before 9:00 or well after 11:30 on the day, especially if you need to fly out of Narita.

The Tsuku-bus bound for Mt. Tsukuba from Tsukuba Center, between 8:55 and 10:55 are
NOT stop at  KEK. Last bus stop is Oho-madogichi Center, Please visit KEK from Oho-madogichi Center on foot.  Bound for Tsukuba Center run on the regular schedule.<Tsukub bus Timetable>
　
　　　　-Traffic regulation Map
　　　　-A detour a Map of around KEK
　　　　-Tsukub bus Timetable
　　　　-Between KEK and Oho-madoguchi Center Road Map