The high-speed train is chugging along. Rendering courtesy of Texas Central

The high-speed railroad from Houston to Dallas has acquired a key new player that will run day-to-day operations.

Renfe, an international railway company based in Spain, has been hired by Texas Central, the project developers, as the train's operating partner. The selection of Renfe as an operating partner marks another major step forward for the Houston-to-North Texas high-speed railroad.

Texas Central CEO Carlos Aguilar says in a statement that Renfe was chosen after a review of the best railroad operators in the world.

"Renfe has established a reputation for excellence in railroad operation in Spain and across the world, and we welcome them aboard," Aguilar says. "With their decades of expertise, they were a natural fit to join our other partners. Having the operator, the design build, and technology teams all on board and able to collaborate will ensure all aspects of the railroad are integrated and efficient."

A release calls Renfe "one of the world's most significant railways operators," running 5,000 trains daily on 7,500 miles of track. The company is integral to the transport system in its home base of Spain, handling more than 487 million passengers and 19.6 million tons of freight moved in 2017.

Renfe, in partnership with Adif, which manages Spanish railway infrastructure, will be responsible for running the trains; maintaining system components, such as engines, signals, and other equipment; and overseeing ticketing, passenger loyalty programs, and other services.

It will also provide technical advice on the design and construction of the Texas train and assist in the further development of Texas Central's operation and maintenance plans, preparing the railroad for passenger service.

Renfe is one of the biggest companies in Spain, employing nearly 14,000 people and recording revenues of 3.6 billion euros in 2017. Its high-speed systems were used by more than 36 million passengers in 2017. In March, Renfe announced that it had posted a net profit of 70 million euros in 2017, thanks in part to a jump in the number of its high-speed passengers, chalking up five consecutive years of growth.

Renfe president Isaías Táboas says the deal is a boon for Texas and for the Spanish railway industry.

"Texas Central represents a large high-speed train project in a country with high-growth potential, for which the Spanish experience will be of great help," he says. "Both Renfe Operadora and Adif have accumulated years and miles of high-speed railway development with professional teams, extensive experience, and specialized knowledge. We are committed to the success of Texas Central in improving the mobility of Texans and others in the U.S."

The agreement comes about a week after Texas Central engaged multinational firm Salini Impregilo ­– operating in the U.S. market with The Lane Construction Corporation – to lead the civil construction consortium that will build the passenger line, including viaducts, embankments, and drainage.

Spain's first high-speed line between Madrid and Seville was dedicated in 1986 and Renfe's first high-speed service connected the cities in 1992.

Its second high-speed line, from Madrid to Barcelona, was completed in 2007. Renfe also operates high-speed service from Barcelona to Paris, Lyon, and Toulouse in France. Among other major international projects, Renfe operates the recently opened high-speed train between Mecca and Medina, in Saudi Arabia.

The 200-mph train will link Houston and Dallas in 90 minutes, with a midway stop in the Brazos Valley.

The Texas train will be based on the latest generation of Central Japan Railway's Tokaido Shinkansen train system, the world's safest mass transportation system. It has operated for more than 54 years with a perfect record of zero passenger fatalities or injuries from operations, and an impeccable on-time performance record.

Texas Central and its partners are refining and updating construction planning and sequencing, guided by the Federal Railroad Administration's recently released draft environmental impact statement. The FRA now is working on a final environmental review that will help determine the project's timeline and final route.

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This story originally appeared on CultureMap.

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Houston leaders form coalition to boost Texas power grid with new tech

a better grid

A Houston-based coalition that launched this month aims to educate Texas officials about technology designed to shore up the state’s power grid.

The public-private Texas Reliability Coalition says it will promote utility-scale microgrid technology geared toward strengthening the resilience and reliability of the Texas power grid, particularly during extreme weather.

A utility-operated microgrid is a group of interconnected power loads and distributed energy sources that can operate in tandem with or apart from regular power grids, such as the grid run by the Electric Reliability Council of Texas (ERCOT). Legislation passed in 2023 enables the use of utility-scale microgrid technology in Texas’ deregulated energy market, according to the coalition.

John Elder, executive director of the coalition, says that with the legal framework now in place, the Public Utility Commission of Texas and ERCOT need to create rules to establish the Texas marketplace for microgrid technology. The goal, he says, is to “take the Texas grid from good to great” by installing microgrid technology, improving the infrastructure, and strengthening the system — all targeted toward meeting power needs during extreme weather and amid growing demand.

Houston-based CenterPoint Energy will test the utility-scale microgrid technology being promoted by the coalition. In a January 31 filing with the Public Utility Commission, CenterPoint says microgrid technology will be featured in a $36.5 million pilot program that’ll set up an estimated three to five microgrids in the company’s service area. The pilot program is slated to last from 2026 to 2028.

In the public affairs arena, five Houston executives are leading the new reliability commission’s microgrid initiative.

Elder, one of the coalition’s founding members, is president and CEO of Houston-based Acclaim Energy. Other founders include Ember Real Estate Investment & Development, Park Eight Development, and PowerSecure. Ember and Park Eight are based in Houston. Durham, North Carolina-based PowerSecure, which produces microgrid technology, is a subsidiary of energy provider Southern Co.

Aside from Elder, members of the coalition’s board are:

  • Stewart Black, board secretary of the coalition and vice president of Acclaim Energy’s midstream division
  • Todd Burrer, president of municipal utility districts at Inframark
  • Harry Masterson, managing principal of Ember
  • Martin Narendorf, former vice president at CenterPoint Energy

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This article originally appeared on our sister site, EnergyCapital.

This Houston neighbor is the fastest growing wealthy suburb in America

By The Numbers

The Houston-area city of Fulshear is booming like nowhere else: It's now the No. 1 fast-growing affluent suburb in the country.

Fulshear's No. 1 status was unveiled in a new GoBankingRates' study that ranked the "30 Fastest Growing Wealthy Suburbs in America" for 2025. The report examined population changes from 2018 to 2023 among cities and towns in major U.S. metro areas with populations between 25,000 and 100,000 residents. Median household income, average home value, and a "livability score" were also calculated for each locale.

Fulshear, located 34 miles west of downtown Houston, experienced the most dramatic population increase out of all 30 cities in the report. Though the suburb only has an estimated population of 42,616 residents, that number has skyrocketed 237 percent during the five-year period.

A Fulshear resident's median income is $178,398 annually, and the average value of a home in the city comes out to $521,157, the report additionally found.

Fulshear was the second fastest growing city in America in 2023. The city's growth is further reflected by the number of new apartments that were built in the area in 2024.

Texas is tops
Texas cities took the top three fastest growing U.S. suburbs for 2025, with Dallas-area cities of Celina (No. 2) and Prosper (No. 3) experiencing wildly different (yet still sky high) population changes. Celina's population ballooned 190 percent to 43,317 residents, while Prosper's grew 81 percent to an estimated 41,660 people.

Other Texas cities that earned spots in the report include Flower Mound (No. 19), Southlake (No. 27), University Park (No. 28) and Colleyville (No. 29), all in the Dallas-Fort Worth area.

"The old adage that everything is bigger in Texas is true, considering the number of Lone Star State suburbs that are quickly growing in population and overall wealth," the report's author wrote.

The top 10 fastest growing wealthy suburbs in America are:

  • No. 1 – Fulshear, Texas
  • No. 2 – Celina, Texas
  • No. 3 – Prosper, Texas
  • No. 4 – Erie, Colorado
  • No. 5 – Clarksburg, Maryland
  • No. 6 – Zionsville, Indiana
  • No. 7 – Redmond, Washington
  • No. 8 – Dublin, California
  • No. 9 – Parkland, Florida
  • No. 10 – Eastvale, California
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This story originally appeared on our sister site CultureMap.com.

Rice research breakthrough paves the way for advanced disease therapies

study up

Bioengineers at Rice University have developed a “new construction kit” for building custom sense-and-respond circuits in human cells, representing a major breakthrough in the field of synthetic biology, which could "revolutionize" autoimmune disease and cancer therapeutics.

In a study published in the journal Science, the team focused on phosphorylation, a cellular process in the body in which a phosphate group is added to a protein, signaling a response. In multicellular organisms, phosphorylation-based signaling can involve a multistage, or a cascading-like effect. Rice’s team set out to show that each cycle in a cascade can be treated as an elementary unit, meaning that they can be reassembled in new configurations to form entirely novel pathways linking cellular inputs and outputs.

Previous research on using phosphorylation-based signaling for therapeutic purposes has focused on re-engineering pathways.

“This opens up the signaling circuit design space dramatically,” Caleb Bashor, assistant professor of bioengineering and biosciences and corresponding author on the study, said in a news release. “It turns out, phosphorylation cycles are not just interconnected but interconnectable … Our design strategy enabled us to engineer synthetic phosphorylation circuits that are not only highly tunable but that can also function in parallel with cells’ own processes without impacting their viability or growth rate.”

Bashor is the deputy director for the Rice Synthetic Biology Institute, which launched last year.

The Rice lab's sense-and-respond cellular circuit design is also innovative because phosphorylation occurs rapidly. Thus, the new circuits could potentially be programmed to respond to physiological events in minutes, compared to other methods, which take hours to activate.

Rice’s team successfully tested the circuits for sensitivity and their ability to respond to external signals, such as inflammatory issues. The researchers then used the framework to engineer a cellular circuit that can detect certain factors, control autoimmune flare-ups and reduce immunotherapy-associated toxicity.

“This work brings us a whole lot closer to being able to build ‘smart cells’ that can detect signs of disease and immediately release customizable treatments in response,” Xiaoyu Yang, a graduate student in the Systems, Synthetic and Physical Biology Ph.D. program at Rice who is the lead author on the study, said in a news release.

Ajo-Franklin, a professor of biosciences, bioengineering, chemical and biomolecular engineering and a Cancer Prevention and Research Institute of Texas Scholar, added “the Bashor lab’s work vaults us forward to a new frontier — controlling mammalian cells’ immediate response to change.”