The Pyeongtaek–Siheung Expressway (Korean: 평택시흥고속도로; RR: Pyeongtaek-Siheung Gosok Doro), Also 2nd Seohaean Expressway, is an expressway in South Korea, connecting Pyeongtaek to Hwaseong, Ansan, and Siheung.

It has Expressway Route No.

153 and is a Branch Line of Seohaean Expressway.

The entire length from Pyeongtaek to Siheung is 42.6 km and the posted speed limit is 100 km/h.

This article relating to roads and highways in South Korea is a stub.