It depends where you live in the world. In my region, Perth Western Australia, 90% of houses are double brick construction. There is plenty of architectural research into the use and stability of lime mortar mixes used in the early to mid 20th century brick buildings. In Australia, the use of lime mortar was in common use until the late 1950's. Lime mortar will only work and is only suitable in a cool climate because the lime mortar absorbs moisture from the atmosphere to keep it stable. In parts of Australia especially Perth Western Australia, over time the lime mortar becomes dry and turns to powder due to the dry climate. The simple solution is to cement render the walls. No different to sealing rammed earth construction walls. 8 parts clean sand, 2 parts Portland cement and one part lime was used for building brick walls for many years until detergent additives replaced the lime. The only purpose of detergent is to make the mixture pliable for the bricklayer. The problem with detergent additives is that the detergent eventually leaches through the mixture where using lime actually helps to harden the mixture. (Modern Portland cement is manufactured by super-heating clay and crushed limestone. When combined with water a chemical reaction occurs and binds both products. When lime is added to the mixture a farther chemical reaction occurs.) Lime mortar was used in England for hundreds of years. Some of the buildings are over 500 years old and still in good condition. They will remain standing long after the Australian houses collapse.

I work in traffic light servicing, Perth Western Australia, for 15 years. Yes it is possible to determine that you ran a red light with one photo and the speed you were travelling at. Furthermore the red light camera can also determine when in the amber period you cross the stop line. In Australia, the sensors work on a stop line loop cut in the road. The traffic controller possesses enough intelligence to count the vehicles and vehicle density. The traffic signal output from the red and amber lamps is monitored by the red light camera. The traffic signal controller is never adjusted for red or amber timings; they are set in a ROM timing and cannot be overridden. Depending on the settings for the particular intersection, the red and amber lamp monitoring can be adjusted by the red light camera installer. In Australia; the red light is usually set for two seconds and amber for four seconds. The first two seconds of amber is a safety entry point into the intersection. ie in the event that the vehicle cannot stop. The next two seconds is the exclusion point before the red change. The red light camera can be programmed to detect a vehicle after the two second amber safety entry point and the red signal. The red light camera will detect the amber entry time and the red time. With one photo and a calibration line marked on the road surface, the authorities can tell how fast a vehicle was travelling when it crossed the stop line.