diff --git a/README.md b/README.md
index 20d5cac..116cf2c 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ IEEE/ACM Asia and South Pacific Design Automation Conference (ASPDAC), Tokyo, Ja
 ["Dr. CU: Detailed Routing by Sparse Grid Graph and Minimum-Area-Captured Path Search"](https://doi.org/10.1109/TCAD.2019.2927542),
 accepted by IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (TCAD).
 * Haocheng Li, Gengjie Chen, Bentian Jiang, Jingsong Chen, and Evangeline F. Y. Young,
-Dr. CU 2.0: A Scalable Detailed Routing Framework with Correct-by-Construction Design Rule Satisfaction,
+"Dr. CU 2.0: A Scalable Detailed Routing Framework with Correct-by-Construction Design Rule Satisfaction",
 IEEE/ACM International Conference on Computer-Aided Design (ICCAD), Westminster, CO, USA, Nov 4-7, 2019.
 
 (Dr. CU supports [ISPD'18 benchmarks](http://www.ispd.cc/contests/18/#benchmarks)
@@ -25,9 +25,9 @@ This version of code is consistent with the ICCAD paper.)
 ## 1. How to Build
 
 **Step 1:** Download the source code. For example,
-~~~
+```bash
 $ git clone https://github.com/cuhk-route/dr-cu
-~~~
+```
 
 **Step 2:** Go to the project root and build by
 ~~~
diff --git a/ispd18eval/ispd18eval.sh b/ispd18eval/ispd18eval.sh
index e6cac01..27a4040 100755
--- a/ispd18eval/ispd18eval.sh
+++ b/ispd18eval/ispd18eval.sh
@@ -51,7 +51,6 @@ if [ -f $evalTcl ] ; then
 fi
 
 echo "#evaluation script for ISPD 2018 contest" > $evalTcl
-echo "setMultiCpuUsage -localCpu $numThread" > $evalTcl
 echo 'source ispd18eval.tcl' >> $evalTcl
 echo "evaluate $inputLef $outputDef $evalGeoRpt $evalConRpt" >> $evalTcl
 echo 'exit' >>$evalTcl
diff --git a/ispd19eval/ispd19eval.sh b/ispd19eval/ispd19eval.sh
index 3013ee5..ca117a5 100755
--- a/ispd19eval/ispd19eval.sh
+++ b/ispd19eval/ispd19eval.sh
@@ -81,7 +81,6 @@ else
 fi
 
 echo "#evaluation script for ISPD 2019 contest" > $evalTcl
-echo "setMultiCpuUsage -localCpu $numThread" > $evalTcl
 echo 'source ispd19eval.tcl' >> $evalTcl
 if [ "$method" = 'a' ] ; then
     echo "evaluate $inputLef $inputDef $trimmedDef $evalGeoRpt $evalConRpt" >> $evalTcl
diff --git a/rsyn/src/rsyn/phy/obj/decl/PhysicalDesign.h b/rsyn/src/rsyn/phy/obj/decl/PhysicalDesign.h
index 50da9e0..8449bcb 100644
--- a/rsyn/src/rsyn/phy/obj/decl/PhysicalDesign.h
+++ b/rsyn/src/rsyn/phy/obj/decl/PhysicalDesign.h
@@ -252,9 +252,6 @@ class PhysicalDesign : public Proxy<PhysicalDesignData> {
 
 	int getNumPhysicalRoutingGrids() const;
 	
-	//! @brief check if the orientations are equivalent based on symmetry.
-	bool checkEquivalentOrientations(Rsyn::PhysicalSymmetry symmetry, Rsyn::PhysicalOrientation orient1, Rsyn::PhysicalOrientation orient2) const;
-
 	//! @brief	Returns the total number of spacing objects.  
 	std::size_t getNumPhysicalSpacing() const;
 	//! @brief	Returns a reference to the vector of PhysicalSpacing. 
diff --git a/rsyn/src/rsyn/phy/obj/impl/PhysicalDesign.cpp b/rsyn/src/rsyn/phy/obj/impl/PhysicalDesign.cpp
index d21c04c..755ceb5 100644
--- a/rsyn/src/rsyn/phy/obj/impl/PhysicalDesign.cpp
+++ b/rsyn/src/rsyn/phy/obj/impl/PhysicalDesign.cpp
@@ -1253,17 +1253,4 @@ void PhysicalDesign::initLayerViaManager() {
 
 // -----------------------------------------------------------------------------
 
-bool PhysicalDesign::checkEquivalentOrientations(Rsyn::PhysicalSymmetry symmetry, Rsyn::PhysicalOrientation orient1,
-	Rsyn::PhysicalOrientation orient2) const {
-
-	std::cout << "TODO " << __func__ << " at " << __FILE__ << "\n";
-	//	if(Rsyn::isPhysicalSymmetryX(symmetry)) {
-	//		return orient1 == Rsyn::ORIENTATION_N ||
-	//	} // end if 
-
-	return false;
-} // end method 
-
-// -----------------------------------------------------------------------------
-
 } // end namespace
diff --git a/rsyn/src/rsyn/phy/util/PhysicalLayerUtil.cpp b/rsyn/src/rsyn/phy/util/PhysicalLayerUtil.cpp
index 73c5558..4f41602 100644
--- a/rsyn/src/rsyn/phy/util/PhysicalLayerUtil.cpp
+++ b/rsyn/src/rsyn/phy/util/PhysicalLayerUtil.cpp
@@ -173,27 +173,6 @@ std::string getPhysicalSymmetry(const Rsyn::PhysicalSymmetry rowSymmetry) {
 
 // -----------------------------------------------------------------------------
 
-bool isPhysicalSymmetryX(const Rsyn::PhysicalSymmetry symmetry) {
-	return symmetry == SYMMETRY_X || symmetry == SYMMETRY_XY || 
-		symmetry == SYMMETRY_XR90 || SYMMETRY_XYR90;
-} // end method 
-
-// -----------------------------------------------------------------------------
-
-bool isPhysicalSymmetryY(const Rsyn::PhysicalSymmetry symmetry) {
-	return symmetry == SYMMETRY_Y || symmetry == SYMMETRY_XY || 
-		symmetry == SYMMETRY_YR90 || SYMMETRY_XYR90;
-} // end method 
-
-// -----------------------------------------------------------------------------
-
-bool isPhysicalSymmetryR90(const Rsyn::PhysicalSymmetry symmetry) {
-	return symmetry == SYMMETRY_R90 || symmetry == SYMMETRY_XR90 || 
-		symmetry == SYMMETRY_YR90 || SYMMETRY_XYR90;
-} // end method 
-
-// -----------------------------------------------------------------------------
-
 Rsyn::PhysicalSiteClass getPhysicalSiteClass(const std::string & siteClass) {
 	if (siteClass.compare("CORE") == 0) return PhysicalSiteClass::CORE;
 	if (siteClass.compare("PAD") == 0) return PhysicalSiteClass::PAD;
diff --git a/rsyn/src/rsyn/phy/util/PhysicalUtil.h b/rsyn/src/rsyn/phy/util/PhysicalUtil.h
index a79a109..235d568 100644
--- a/rsyn/src/rsyn/phy/util/PhysicalUtil.h
+++ b/rsyn/src/rsyn/phy/util/PhysicalUtil.h
@@ -56,15 +56,6 @@ Rsyn::PhysicalSymmetry getPhysicalSymmetry(const std::string &rowSymmetry);
 //! Converts Symmetry from enum to string, respectively.
 std::string getPhysicalSymmetry(const Rsyn::PhysicalSymmetry rowSymmetry);
 
-// ! @brief check if PhysicalSymmetry has symmetry to X.
-bool isPhysicalSymmetryX(const Rsyn::PhysicalSymmetry symmetry);
-
-// ! @brief check if PhysicalSymmetry has symmetry to Y.
-bool isPhysicalSymmetryY(const Rsyn::PhysicalSymmetry symmetry);
-
-// ! @brief check if PhysicalSymmetry has symmetry to XR90.
-bool isPhysicalSymmetryR90(const Rsyn::PhysicalSymmetry symmetry);
-
 //! Converts Site Class from string to enum, respectively.
 Rsyn::PhysicalSiteClass getPhysicalSiteClass(const std::string & siteClass);