Due to the road works at the Bolu Mountain crossing of the TEM Highway, there was heavy vehicle traffic in the direction of Ankara, at the Bolu Mountain location of the D-100 Highway.
TEM Highway Bolu Mountain Tunnel was closed to transportation at around 15.00 due to the joint renewal work that will take 1 month in Ankara direction. Vehicles going in the direction of Ankara used the Bolu Mountain passage of the D-100 Highway. The vehicles that were directed from the Kaynaslı toll booths of Düzce to the D-100 highway due to road works created a traffic density. Traffic density occurred, especially due to heavy tonnage vehicles using the left lane. Traffic came to a standstill from time to time on the steep slopes of Bolu Mountain. Traffic returned to its normal flow after overcoming the ramps. Later, the vehicles passed from the Bolu Abant toll booths to the TEM Highway and continued on their way freely.