NEXCO EAST Kanto Regional Head Office (Taito-ku, Tokyo) is, Kan-Etsu Expressway (Kan-Etsu Expressway) In-bound but we have promoted the construction work to increase the lane aiming to alleviate traffic congestion in the vicinity of Kosaka service area of the line (SA), this time on August 9 We will inform you that an additional lane will open on Friday.

1 Date and time of opening

Friday, August 9, 2013 14:00
*The opening time may change depending on the weather conditions on the day.

2 Open places

"Additional lane" that extends about 1.3 km from a point about 1.5 km on the Tokyo side from Takasaka SA on the Kan-Etsu Expressway In-bound line
(From Sakado City, Saitama Prefecture, near the large door, near Sakado City, Saitama Prefecture, near Nakazato)

3 Business overview

Kan-Etsu Expressway In-bound Near Takasaka SA on the line, heavy traffic jams occur on the afternoons of holidays, especially during the Obon season, large holidays in spring and autumn, and during the holiday season. For the purpose of alleviating the traffic congestion, we are working together with the Sakado Nishi smart IC maintenance business to install additional lanes at locations with frequent traffic congestion near Kosaka SA.

4 Position map

5 Causes of traffic congestion and measures for improvement near Kosaka SA

Kan-Etsu Expressway In-bound in the vicinity of approximately 1.5km from Kosaka SA of lines to Tokyo side, loose Out-bound slope (gradient about 1.0%) from the loose In-bound slope sag portion that varies (gradient about 1.2%) (Out-bound from Slope In-bound recess approaches the slope In ), due to unconscious speed reduction, heavy traffic congestion occurs during heavy traffic. In order to alleviate this congestion, loose In-bound was established additional lane from just before the slope starts in about 1.3km section up to near the top of the hill.

6 Improvement effects after countermeasures

By installing additional lanes at high traffic congestion areas near Takasaka SA, traffic capacity will increase, and we anticipate that congestion will be reduced by about 20% in the traffic area near Takasaka SA.

7 Sakado West Smart IC

The Sakado Nishi Smart IC, which was undertaking business at the same time, will open on August 25 (Sun) at 15:00. Regarding the opening of the IC, Here..