Chapter 10.12 TRAFFIC-CONTROL DEVICES1 This chapter is included in your selections. Sections: 10.12.010 Installation--Authority. 10.12.020 Required for enforcement. 10.12.030 Signals--Installation--Location determination. 10.12.040 Lane markings--Authorized--Compliance required. 10.12.050 Removal, relocation or discontinuance--Authority. 10.12.060 Hours of operation--Determination.