fix typo in rail blog post

Author: elpabl0

_posts/2016-01-28-future-thinking-rail.md

@@ -32,7 +32,7 @@ Intelligent systems using historic data and machine learning could provide succi
 Most train carriages and buses already have CCTV for security and safety. These same cameras could be used to monitor and manage passenger density in carriages. Machine vision is an area of technology that is rapidly improving; software could be used to identify empty seats and crowded carriages, letting staff and passengers know where to go to ensure better distribution of passengers and a more pleasant journey for all.
 
 ##Data Everywhere
-high speed Wifi connections on trains and platforms. Wifi is now ubiquitous across most of the London Underground network and many operators provide wifi in carriages. Elsewhere, the UK’s ever expanding 4G networks provide high speed data to mobile devices. With the advent of 5G networks in the not too distant future, we’ll all be hooked up to super-fast, low latency data connections, wherever we are.
+High speed Wifi connections on trains and platforms. Wifi is now ubiquitous across most of the London Underground network and many operators provide wifi in carriages. Elsewhere, the UK’s ever expanding 4G networks provide high speed data to mobile devices. With the advent of 5G networks in the not too distant future, we’ll all be hooked up to super-fast, low latency data connections, wherever we are.
 
 ##Digital Advertising
 Large, colour digital screens in carriages, providing up to the minute train information alongside rich media adverts, will no doubt replace the existing paper posters. Cost is likely to be the main barrier to this at the moment, as it’s already technically feasible. However, low cost, low power CPUs are widely available to drive the screens, and LED panel technology is getting cheaper. Digital signage mostly needs commitment from the ad-selling media companies. Touch screens could enable customer interaction and further enhance engagement and the availability of information.