Silver Spring gets bike lane “tiles”
On Thursday evening workers installed new, separated bike lanes and bike boxes on Spring and Cedar streets in Silver Spring. The construction was surprisingly fascinating, as a series of live-tweets show. It turns out the latest method for painting bike lanes green is to use tiles instead of paint.
The Montgomery County Division of Transportation Engineering, @MoCo_DTE on Twitter, began tweeting out the process around 7:30 pm. Check it out:
Fun fact: the green markings we use in high-traffic areas are actually pre-formed tiles. They're melted into the asphalt atop sealant. pic.twitter.com/QPu82JvDtI
— MC_DTE (@MoCo_DTE) September 14, 2017
The technical term for these tiles is “preformed thermoplastic.” It's more durable than the spray-on epoxy “paint” that graces some of the region's other bike lanes.
This machine will heat the pavement and the green tiles to about 450°F to melt them into the asphalt. pic.twitter.com/3IJPRPC4md
— MC_DTE (@MoCo_DTE) September 14, 2017
Not quite chestnuts roasting on an open fire, but close, right? #greenlane pic.twitter.com/Z7aMKfIWtB
— MC_DTE (@MoCo_DTE) September 14, 2017
Grit is added by hand atop the hot material to add friction for skid resistance. pic.twitter.com/m3pI5EXbQE
— MC_DTE (@MoCo_DTE) September 14, 2017
Symbols come pre-formed. Some assembly required. pic.twitter.com/uMy8G3knGV
— MC_DTE (@MoCo_DTE) September 15, 2017
The tiles are square, but the intersection geometry isn't. So crews trim the green to fit inside the white lines. pic.twitter.com/eVyxrPMp8q
— MC_DTE (@MoCo_DTE) September 15, 2017
We're gonna stop live-tweeting now, but the crew will be working all night. Cedar/Ellsworth intersection will be done by tomorrow morning. pic.twitter.com/ziBVo3TZMi
— MC_DTE (@MoCo_DTE) September 15, 2017
Surprisingly, watching paint dry is actually pretty cool!