Main st. Banks square intersection, and also totten pond rd. Piety corner intersection

Statistically I believe it's Trapelo/Lexington St. but with the rate at which people go through the red lights at Totten Pond/Lexington it's amazing there aren't more accidents there.

Main St @ Harvard St..Most because people blow off the left only turn..Waltham PD needs to enforce that turn with more vigilance. Similar to their early summer effort to penalize drivers for blocking intersections.

One of the worst is not even an intersection. The driveway out of Wal-Lex in front of TJ Maxx (right turn only) is just a few feet from the driveway at Bugger King. In the past 6 months alone I've personally witnessed 3 accidents there - people turning right out of TJMaxx crash into people turning left out of Burger King as they both dart out once the Lexington St traffic has cleared.

One of the most dangerous intersections for PEDESTRIANS is Main and Moody, where pedestrians have a scant 10 seconds to cross. That gives many people just about enough time to get oh, about halfway across, before the cars take over again. Take a look at the facial expressions of people trying to cross there sometime and you'll see just how frightening it can be.

One of the worst I've seen in my 6 years in Waltham is the Cherry Street and Adams Street intersection. Cars park on the south side of Adams Street, blocking the view of cars coming up Cherry Street. Many people using Cherry to get to Moody Street fly up the street, come to a screeching halt at the stop sign, and then have to slowly edge forward to see if there are cars coming in either direction on Adams.

Bacon/Plympton/Athletic Field Rd. SO many accidents. It's hard to see especially coming from Athletic Field Rd. and cars gather so much speed going down the hill at Bacon.
Also South/Weston/Main St, especially going westbound. So many people fail to turn left onto South when in that lane and instead go on Weston St. Short time to jockey before it's a single lane (and soon an entrance/exit to Waltham Marketplace)

River St. at Bright St is pretty bad.

Lexington Street & Totten Pond Road, particularly turning right from Totten Pond onto Lexington. There are two turning lanes, and the people in the right-most lane do not stay in their lanes. Some are turning onto Bacon Street from there and swing wide, others just don't hold their lane and jeopardize those in the other turn lane. The city could improve this tremendously just be repainting the lines so that people would have a guide of the lane they should maintain.

Oh, let me count the ways as a pedestrian: Main & Moody, River & Seyon, Gore & Seyon at night, River & Elm, etc.

Is that car in the photo really on the wrong side of the road, or did you just reverse the photo?

Winthrop and Boynton for sure!!!

My Partner was almost killed when a Car and Landscape Truck Collided in the INtersection and The car pinned Her between the House and Car.

Unfortunately (and obviously from all the posts) too many to choose from. However, the real danger lies in the fact that there are too many inattentive, distracted, in-a-rush and just plain old bad drivers out there at these intersections and of course, on the road in general. Seriously, slow down, put the phone down (or at least get a headset!) and pay attention!

OK. My pics being studying traffic and construction engineering are Moody Street @ Maple Street/High Street, Totten Pond Road @ Bacon Street/Lexington Street, Plympton Street @ Bacon Street, Trapelo Road @ Forest Street (Being Redone This Year!), Lexington Street @ Trapelo Road, Wyman Street/Smith Street @ Lincoln Street & Newton Street @ Main Street.