Smart Start - Your Trusted Ignition Interlock Partner. Smart Start is the premier provider with a foundation built on superior product innovation with its easy-to-use Ignition Interlock Device (IID), and excellent, bilingual customer service available 24/7/365.  Why Choose Smart Start?  Smart Start has Ignition Interlock Installation Experts, Convenient Locations across TX, Flexible Scheduling, and Competitive Pricing.  Regain your freedom with Smart Start's Ignition Interlock in Grand Prairie, TX. Don't let a DUI hold you back. Contact us today to book your install!