2017-01-01 Sun

Clear Thinking

Back on Friday October 28th the Toronto Star ran an article by Michel Grignon titled “Slow down and stop the killing”. Within the article were many numeric data.

Christopher Greaves SlowDownAndStop.png

The figures in the data cells in columns A, B and D are taken from the Toronto Star article .

The charts I made myself.

Note the similarity between the two charts.

Remember, as always, the Squared law(s) of Physics.

In this case TWO squared laws are in effect:-

(1) Kinetic Energy is proportional to the SQUARE of the velocity. If I am traveling at 100 KM/hr and you are raveling at 120 KM/h, then you have 1.2*1.2 or 1.44 times as much kinetic energy that must be dissipated before you come to a stop.

(2) Distance Travelled is roughly proportional to the SQUARE of the velocity. If I am traveling at 100 KM/hr and you are raveling at 120 KM/h, then you have 1.2*1.2 or 1.44 times as much distance that must be dissipated before you come to a stop.

Pedestrians are killed when a vehicle collides with them. It is, we agree, no contest.

Reducing speeds has such a beneficial and immediate effect because the energy drops as the SQUARE of the speed, and the distance traveled (if the driver sees the pedestrian) drops as the SQUARE of the speed.

Clear Thinking

5 km of public roads shut down by private construction called 'alarming' by Toronto councillor - Toronto - CBC News

Back on November 21st CBC news carried an article by Chris Glover “5 km of public roads shut down by private construction called 'alarming' by Toronto councillor”.

My local councilor is quoted : Wong-Tam said she receives almost daily complaints about the road closures. What people don't know, she said, is that before any road occupancy permit is approved it goes through a very "rigorous" technical review and negotiation between the city and the developer. 

What no-one is `doing is working towards helping the private contractors solve their own problem: Withhold payment/refunds until the site is freed of all construction debris and construction material, and until the sidewalks, kerbing and so on are in good repair.

If you were a contractor and learned that the final, oh, say, twenty percent of your bill would be withheld until you provided digital photographs showing an immaculate site, you’ld work hard at leaving the site immaculate.

If you were a constructor and learned that the your hefty deposit would be held until you provided digital photographs showing an immaculate site, you’ld work hard at leaving the site immaculate.

This is a simple fix, one extra but small clause to all construction permits and contracts.

The city can keep the interest earned on the held/withheld funds.