--- title: Modernize Transit Infrastructure | Accelerated Retrofits & Engineering | Sunrise Systems description: Modernize your transit infrastructure quickly and cost-effectively. Our engineering solutions enhance reliability and extend the lifespan of your existing assets. Contact us to learn more. --- [![Sunrise-Systems](https://www.sunrisesystems.com/hs-fs/hubfs/Sunrise%20System%20-%20Jan%202026/images/Sunrise-Systems-Logo.png?width=286&height=43&name=Sunrise-Systems-Logo.png "Sunrise-Systems")](https://sunrisesesatech.com) - [Solutions](https://www.sunrisesystems.com/products) - [Transit](https://www.sunrisesystems.com/transit) - [ITS](https://www.sunrisesystems.com/its) - [Retrofit](https://www.sunrisesystems.com/retrofits) - [About Us](https://www.sunrisesystems.com/about) - [News](https://www.sunrisesystems.com/news) - [Leadership](https://www.sunrisesystems.com/leadership) - [Careers](https://www.sunrisesystems.com/careers) - Resources - [Downloads](https://www.sunrisesystems.com/downloads) ** [Contact Us ](https://www.sunrisesystems.com/contact) ** This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. # **Modernize Your Transit Infrastructure in Months, Not Years** #### Strategic Retrofitting & Obsolescence Engineering for Transit & ITS ## The Retrofit Advantage #### **Stop waiting long procurement cycles.** We restore your critical infrastructure on an accelerated timeline. ![back-in-time](https://www.sunrisesystems.com/hubfs/back-in-time.svg) ##### RAPID TURNAROUND While competitors measure lead times in years, our engineering-led process delivers results in **months**. ![efficient](https://www.sunrisesystems.com/hubfs/efficient.svg) ##### COST EFFICIENCY: Avoid the massive capital expenditure of "rip and replace" by modernizing your existing assets. ![explore](https://www.sunrisesystems.com/hubfs/explore.svg) ##### OPERATIONAL CONTINUITY: Restore revenue streams and passenger information systems without the need for structural construction. ## Our Core Expertise ## 1 #### Obsolescence Re-Engineering When the OEM sunsets a product, we step in. We reverse-engineer defunct components—from rail car electronics to roadside controllers—to create high-precision, sustainable replacements. **Result: Permanent solutions for "unfindable" parts.** ## 2 #### ITS & Transit Asset Modernization We integrate modern internals into your existing housings. Keep your gantries and pylons; upgrade the technology inside. - **Smart Integration: Replace proprietary boards with open-standard, NTCIP-compliant technology.** - **Lifecycle Extension: Extend the ROI of your most valuable assets by decades.** ## 3 #### Validated Performance Reliability is non-negotiable in 24/7 transit environments. Every system undergoes exhaustive **in-house validation** using calibrated instrumentation. **Testing Standards: ** - **Rail:** Certified to meet EN 50155 standards - **ITS:** Certificated to meet NEMA standards **Superior Standards: Our components are engineered to exceed original OEM specifications.** ## Retrofit Solutions [![retro-hero](https://www.sunrisesystems.com/hs-fs/hubfs/Imported%20images/retro-hero.jpeg?width=330&height=330&name=retro-hero.jpeg) ###### Signage We sell the full retrofit sign package as a lump sum per DMS upgraded, so there are no surprises with the cost or the services provided. Learn more ** ](https://www.sunrisesystems.com/contact-us) [![TxDOT-Retrofit2](https://www.sunrisesystems.com/hs-fs/hubfs/Blog_Images/TxDOT-Retrofit2.png?width=437&height=330&name=TxDOT-Retrofit2.png) ###### Passenger Audio Systems Our Passenger Information Systems deliver real-time information to enhance the passenger experience, reassuring the ability to keep people informed about their exact location along the route. Learn more ** ](https://www.sunrisesystems.com/contact-us) [![retro-hero](https://www.sunrisesystems.com/hs-fs/hubfs/Imported%20images/retro-hero.jpeg?width=330&height=330&name=retro-hero.jpeg) ###### Control Units We sell the full retrofit sign package as a lump sum per DMS upgraded, so there are no surprises with the cost or the services provided. Learn more ** ](https://www.sunrisesystems.com/contact-us) [![retro-hero](https://www.sunrisesystems.com/hubfs/Imported%20images/retro-hero.jpeg) ###### Radio Interface Systems We sell the full retrofit sign package as a lump sum per DMS upgraded, so there are no surprises with the cost or the services provided. Learn more ** ](https://www.sunrisesystems.com/contact-us) [![Sunrise-SESA-Cameras](https://www.sunrisesystems.com/hubfs/Sunrise-SESA-Cameras.jpg) ###### Camera Designed and built in our factory, our custom transit cameras accommodate any size, shape or interface beyond ethernet. We integrate visible/infrared sensors and specialized on-camera software to match your infrastructure. Learn more ** ](https://www.sunrisesystems.com/contact-us) [![Sunrise Transit Products](https://www.sunrisesystems.com/hubfs/SESA_Sep20/Products/product1.jpg) ###### Information Display Units Intuitive touch control at your fingertips. Seamlessly navigate menus and manage critical vehicle tasks through a high-performance interface. Learn more ** ](https://www.sunrisesystems.com/contact-us) ## Transit & ITS Applications | ###### **Asset Type** | ###### **The Challenge** | ###### **Our Retrofit Solution** | | --- | --- | --- | | ###### **Digital Signage (DMS/PIDS)** | ##### Obsolete LED drivers / No OEM support. | ##### ** Modern controller integration** in existing housings. | | ###### **Wayside / Signaling** | ##### Defunct proprietary circuit boards. | ##### ****** Reverse-engineered electronics** with modern components. | | ###### **Rolling Stock** | ##### Aging onboard communication systems. | ##### ****** Rapid redesign** of internal modules to restore fleet uptime. | ## Ready to bridge the gap between legacy hardware and modern tech? [![Contact us](https://no-cache.hubspot.com/cta/default/1952572/355b770a-cbfc-41c3-8607-6124929f608d.png)](https://cta-redirect.hubspot.com/cta/redirect/1952572/355b770a-cbfc-41c3-8607-6124929f608d) ![footer_bg](https://www.sunrisesystems.com/hubfs/SESA_Sep20/Home/footer-bg.jpg "footer_bg") - [Solutions](https://www.sunrisesystems.com/products) - [Transit](https://www.sunrisesystems.com/transit) - [ITS](https://www.sunrisesystems.com/its) - [Retrofit](https://www.sunrisesystems.com/retrofits) - [About Us](https://www.sunrisesystems.com/about) - [News](https://www.sunrisesystems.com/news) - [Leadership](https://www.sunrisesystems.com/leadership) - [Careers](https://www.sunrisesystems.com/careers) - Resources - [Downloads](https://www.sunrisesystems.com/downloads) #### Address 720 Washington Street Pembroke, MA 02359 [sales@sunrisesystems.com](mailto:sales@sunrisesystems.com)[tel:7818269706](tel:7818269706) © Copyright 2026 SunriseSystems, Inc. [**](https://www.facebook.com/p/Sunrise-SESA-Technologies-100076043116468/) [**](https://www.linkedin.com/company/sunrise-sesa-technologies) ![websights](https://ws.zoominfo.com/pixel/63188587dc61f37d6066357c) ```json { "@context" : "http://www.schema.org", "@type" : "Organization", "address" : { "@type" : "PostalAddress", "addressCountry" : "United States", "addressLocality" : "Pembroke", "addressRegion" : "Massachusetts", "postalCode" : "02359", "streetAddress" : "720 Washington Street" }, "contactPoint" : { "@type" : "ContactPoint", "contactType" : "customer support", "telephone" : "+1(781) 781-9706" }, "description" : "As an engineering-centric organization, Sunrise SESA Technologies transforms LED signage into applications across the world for transportation, transit, and commercial industries. We are proud to engineer and manufacture our products in the USA and adhere to strict quality standards ensuring our craftsmanship and long-term performance.", "logo" : "https://www.sunrisesesatech.com/hs-fs/hubfs/SESA_Sep20/logo-img.png?width=283&name=logo-img.png", "name" : "Sunrise SESA Technologies", "sameAs" : [ "https://www.facebook.com/Sunrise-Systems-135862886462729/", "https://twitter.com/sunrise_systems", "https://www.intensedebate.com/people/SunriseSESA", "https://gust.com/companies/sunrise-sesa-technologies", "https://sunrisesesatech.contently.com/", "http://cs.astronomy.com/members/sunrisesesa/default.aspx", "http://www.lacartes.com/business/Sunrise-SESA/1975504", "https://www.smartguy.com/best-electric-equipment-supplies-retail-pembroke-ma-usa", "https://directory.company.com/business/view/sunrise-sesa", "https://wordpress.org/support/users/sunrisesesatech/" ], "url" : "https://www.sunrisesesatech.com/" } ```